MESON Chess Problem Database
Problem Display
PID: 70438 (8/2R2Q2/K2pBp2/BNrn1rp1/1pk3p1/1bPpP3/7q/1R1N1n2 w - - 0 1)
Lewis, Robert Tony
Chess, 1951
#2
10 + 13
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Qh7
- 2.Sb2#
- 2.Sxd6#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Rc6+
- 2.Rxc6#
- 1...Rxc7
- 2.Qxc7#
- 1...Rf2
- 2.Bxd5#
- 1...Rf3
- 2.Bxd5#
- 1...Rf4
- 2.Sxd6#
- 2.Bxd5#
- 1...Re5
- 2.Sxd6#
- 1...Bxd1
- 2.Rxb4#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 1...Sxe3
- 2.Sxe3#
- 1...Sg3
- 2.Sxd6#
- 1...d2
- 2.Sb2#
- 1...bxc3
- 2.Sa3#
- 1...g3
- 2.Sxd6#
- 1...Qg1
- Tries
- 1.Bxb4?
- threat
- 2.Sa3#
- 1...Rc6+
- 2.Rxc6#
- 1...d2
- 2.Sb2#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qa2+!
- threat
- 1.Bxf5?
- 1...Rc6+
- 2.Rxc6#
- 1...Bxd1
- 2.Rxb4#
- 1...Sxe3
- 2.Sxe3#
- 1...bxc3
- 2.Sa3#
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Qh7
- 2.Sb2#
- 2.Sxd6#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 1...Sg3
- 2.Sxd6#
- 1...d2
- 2.Sb2#
- 1...g3
- 2.Sxd6#
- 1...Rxc7!
- 1...Rc6+
- 1.Rc6?
- 1...Bxd1
- 2.Rxb4#
- 1...Sxe3
- 2.Sxe3#
- 1...bxc3
- 2.Sa3#
- 1...d2
- 2.Sb2#
- 1...Rf2
- 2.Bxd5#
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Qh7
- 2.Sb2#
- 2.Sxd6#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Rf3
- 2.Bxd5#
- 1...Rf4
- 2.Sxd6#
- 2.Bxd5#
- 1...Re5
- 2.Sxd6#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 1...Sg3
- 2.Sxd6#
- 1...g3
- 2.Sxd6#
- 1...Rxc6+!
- 1...Bxd1
- 1.Rc8?
- 1...Rc6+
- 2.Rxc6#
- 1...Bxd1
- 2.Rxb4#
- 1...Sxe3
- 2.Sxe3#
- 1...bxc3
- 2.Sa3#
- 1...Rc7
- 2.Rxc7#
- 2.Qxc7#
- 1...d2
- 2.Sb2#
- 1...Rf2
- 2.Bxd5#
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Qh7
- 2.Sb2#
- 2.Sxd6#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Rf3
- 2.Bxd5#
- 1...Rf4
- 2.Sxd6#
- 2.Bxd5#
- 1...Re5
- 2.Sxd6#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 1...Sg3
- 2.Sxd6#
- 1...g3
- 2.Sxd6#
- 1...Rxc8!
- 1...Rc6+
- 1.Qg6?
- 1...Rc6+
- 2.Rxc6#
- 1...Bxd1
- 2.Rxb4#
- 1...Sxe3
- 2.Sxe3#
- 1...bxc3
- 2.Sa3#
- 1...d2
- 2.Sb2#
- 1...Rf2
- 2.Qe4#
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Qh7
- 2.Sb2#
- 2.Sxd6#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Rf3
- 2.Qe4#
- 1...Rf4
- 2.Sxd6#
- 1...Re5
- 2.Sxd6#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 1...Sg3
- 2.Sxd6#
- 1...g3
- 2.Sxd6#
- 1...Rxc7!
- 1...Rc6+
- 1.Qg8?
- 1...Rc6+
- 2.Rxc6#
- 1...Bxd1
- 2.Rxb4#
- 1...Sxe3
- 2.Sxe3#
- 1...bxc3
- 2.Sa3#
- 1...d2
- 2.Sb2#
- 1...Rf2
- 2.Bxd5#
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Qh7
- 2.Sb2#
- 2.Sxd6#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Rf3
- 2.Bxd5#
- 1...Rf4
- 2.Sxd6#
- 2.Bxd5#
- 1...Re5
- 2.Sxd6#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 1...Sg3
- 2.Sxd6#
- 1...g3
- 2.Sxd6#
- 1...Rxc7!
- 1...Rc6+
- 1.Qxf6?
- threat
- 2.Qd4#
- 1...Rc6+
- 2.Rxc6#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Rf4
- 2.Sxd6#
- 1...Re5
- 2.Sxd6#
- 1...Rxf6!
- threat
- 1.cxb4?
- threat
- 2.Sa3#
- 1...Rc6+
- 2.Rxc6#
- 1...Sxe3
- 2.Sxe3#
- 1...d2
- 2.Sb2#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Bxd1!
- threat
- 1.e4?
- 1...Rc6+
- 2.Rxc6#
- 1...Rxc7
- 2.Qxc7#
- 1...Bxd1
- 2.Rxb4#
- 1...d2
- 2.Sb2#
- 1...Rf2
- 2.Bxd5#
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Qh7
- 2.Sb2#
- 2.Sxd6#
- 1...Qh8
- 2.Sb2#
- 2.Sxd6#
- 1...Rf3
- 2.Bxd5#
- 1...Rf4
- 2.Sxd6#
- 2.Bxd5#
- 1...Re5
- 2.Sxd6#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 2.Sxd6#
- 1...g3
- 2.Sxd6#
- 1...bxc3!
- 1...Rc6+
- 1.Bxb4?
- Keys
- 1.Qh7!
- 1...Rc6+
- 2.Rxc6#
- 1...Qxh7
- 2.Sb2#
- 2.Sxd6#
- 1...Rxc7
- 2.Qxc7#
- 1...Bxd1
- 2.Rxb4#
- 1...Sxe3
- 2.Sxe3#
- 1...bxc3
- 2.Sa3#
- 1...d2
- 2.Sb2#
- 1...Rf2
- 2.Qe4#
- 1...Qg1
- 2.Sb2#
- 2.Sxd6#
- 1...Qg3
- 2.Sb2#
- 1...Qf4
- 2.Sb2#
- 1...Qe5
- 2.Sb2#
- 1...Qh1
- 2.Sb2#
- 2.Sxd6#
- 1...Qa2
- 2.Sxd6#
- 1...Qb2
- 2.Sxb2#
- 2.Sxd6#
- 1...Qc2
- 2.Sxd6#
- 1...Qd2
- 2.Sxd6#
- 1...Qe2
- 2.Sxd6#
- 1...Qf2
- 2.Sxd6#
- 1...Qg2
- 2.Sxd6#
- 1...Qh3
- 2.Sb2#
- 2.Sxd6#
- 1...Qh4
- 2.Sb2#
- 2.Sxd6#
- 1...Qh5
- 2.Sb2#
- 2.Sxd6#
- 1...Qh6
- 2.Sb2#
- 2.Sxd6#
- 1...Rf3
- 2.Qe4#
- 1...Rf4
- 2.Sxd6#
- 1...Re5
- 2.Sxd6#
- 1...Ba2
- 2.Rxb4#
- 1...Bc2
- 2.Rxb4#
- 1...Ba4
- 2.Rxb4#
- 1...Sd2
- 2.Sb2#
- 1...Sg3
- 2.Sxd6#
- 1...g3
- 2.Sxd6#
- 1...Rc6+
- 1.Qh7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- R(h);CHECK,OGATEB::R(I),XR(h)
- R(h);N_SPINR(h),OGATE,XR(I)::QAR(J),XR(h)
- R(j);N_GUARD::B(H),XS(i)
- R(j);S_CUTQ(b)::S(F),XP(l)
- B(c);OGATE,XS(B)::R1(A),XP(e)
- B(c);OGATE::R1(A),XP(e)
- S(a);S_CUTQ(b)::S(B)
- S(a);XP(D)::S(B),XS(a)
- S(a);S_CUTQ(b)::S(F),XP(l)
- P(d);S_CUTQ(b)::S(B)
- P(e);N_GUARD,XP(C)::S(F)
- P(g);S_CUTQ(b)::S(F),XP(l)
- Tries
- Try
- B(E);XP(e)
- Threat
- S(F)
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- P(d);S_CUTQ(b)::S(B)
- Refutation
- Q(b);CHECK
- Try
- B(H);XR(j)
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- B(c);OGATE,XS(B)::R1(A),XP(e)
- S(a);XP(D)::S(B),XS(a)
- P(e);N_GUARD,XP(C)::S(F)
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- B(c);OGATE::R1(A),XP(e)
- S(a);S_CUTQ(b)::S(B)
- S(a);S_CUTQ(b)::S(F),XP(l)
- P(d);S_CUTQ(b)::S(B)
- P(g);S_CUTQ(b)::S(F),XP(l)
- Refutation
- R(h);N_SPINR(h),XR(I)
- Try
- R(I);
- Vars
- B(c);OGATE,XS(B)::R1(A),XP(e)
- S(a);XP(D)::S(B),XS(a)
- P(e);N_GUARD,XP(C)::S(F)
- P(d);S_CUTQ(b)::S(B)
- R(j);N_GUARD::B(H),XS(i)
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- R(j);S_CUTQ(b)::S(F),XP(l)
- B(c);OGATE::R1(A),XP(e)
- S(a);S_CUTQ(b)::S(B)
- S(a);S_CUTQ(b)::S(F),XP(l)
- P(g);S_CUTQ(b)::S(F),XP(l)
- Refutation
- R(h);CHECK,N_SPINR(h),XR(I)
- Try
- R(I);
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- B(c);OGATE,XS(B)::R1(A),XP(e)
- S(a);XP(D)::S(B),XS(a)
- P(e);N_GUARD,XP(C)::S(F)
- P(d);S_CUTQ(b)::S(B)
- R(j);N_GUARD::B(H),XS(i)
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- R(j);S_CUTQ(b)::S(F),XP(l)
- B(c);OGATE::R1(A),XP(e)
- S(a);S_CUTQ(b)::S(B)
- S(a);S_CUTQ(b)::S(F),XP(l)
- P(g);S_CUTQ(b)::S(F),XP(l)
- Refutation
- R(h);N_SPINR(h),XR(I)
- Try
- Q(J);
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- B(c);OGATE,XS(B)::R1(A),XP(e)
- S(a);XP(D)::S(B),XS(a)
- P(e);N_GUARD,XP(C)::S(F)
- P(d);S_CUTQ(b)::S(B)
- R(j);OGATE::QAR2(J)
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- R(j);S_CUTQ(b)::S(F),XP(l)
- B(c);OGATE::R1(A),XP(e)
- S(a);S_CUTQ(b)::S(B)
- S(a);S_CUTQ(b)::S(F),XP(l)
- P(g);S_CUTQ(b)::S(F),XP(l)
- Refutation
- R(h);N_SPINR(h),XR(I)
- Try
- Q(J);
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- B(c);OGATE,XS(B)::R1(A),XP(e)
- S(a);XP(D)::S(B),XS(a)
- P(e);N_GUARD,XP(C)::S(F)
- P(d);S_CUTQ(b)::S(B)
- R(j);N_GUARD::B(H),XS(i)
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- R(j);S_CUTQ(b)::S(F),XP(l)
- B(c);OGATE::R1(A),XP(e)
- S(a);S_CUTQ(b)::S(B)
- S(a);S_CUTQ(b)::S(F),XP(l)
- P(g);S_CUTQ(b)::S(F),XP(l)
- Refutation
- R(h);N_SPINR(h),XR(I)
- Try
- Q(J);XP(m)
- Threat
- QAR1(J)
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- Q(b);N_GUARD::S(B)
- R(j);S_CUTQ(b)::S(F),XP(l)
- Refutation
- R(j);XQ(J)
- Try
- P(C);XP(e)
- Threat
- S(F)
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- S(a);XP(D)::S(B),XS(a)
- P(d);S_CUTQ(b)::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Refutation
- B(c);XS(B)
- Try
- P(D);
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- R(h);N_SPINR(h),OGATE,XR(I)::QAR(J),XR(h)
- B(c);OGATE,XS(B)::R1(A),XP(e)
- P(d);S_CUTQ(b)::S(B)
- R(j);N_GUARD::B(H),XS(i)
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- R(j);S_CUTQ(b)::S(F),XP(l)
- B(c);OGATE::R1(A),XP(e)
- S(a);N_GUARD::S(B),XS(a)
- P(g);S_CUTQ(b)::S(F),XP(l)
- Refutation
- P(e);XP(C)
- Try
- Actual
- Q(J);
- Vars
- R(h);CHECK,OGATEB::R(I),XR(h)
- R(h);N_SPINR(h),OGATE,XR(I)::QAR(J),XR(h)
- B(c);OGATE,XS(B)::R1(A),XP(e)
- S(a);XP(D)::S(B),XS(a)
- P(e);N_GUARD,XP(C)::S(F)
- P(d);S_CUTQ(b)::S(B)
- R(j);OGATE::QAR2(J)
- Q(b);N_GUARD::S(B)
- Q(b);N_GUARD,P_PINB(E)::S(F),XP(l)
- Q(b);N_GUARD::S(F),XP(l)
- R(j);S_CUTQ(b)::S(F),XP(l)
- B(c);OGATE::R1(A),XP(e)
- S(a);S_CUTQ(b)::S(B)
- S(a);S_CUTQ(b)::S(F),XP(l)
- P(g);S_CUTQ(b)::S(F),XP(l)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).