MESON Chess Problem Database
Problem Display
PID: 71 (8/7p/N6K/p1rpNQP1/R1Pk3p/2p1pp1r/2B1pP1b/4B3 w - - 0 1)
Booth, David (Jr)
5th Prize, L'Echiquier, 1930
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Rg3
- 2.Qf4#
- 1...Rxc4
- 2.Sc6#
- 1...Rb5
- 2.Sc6#
- 2.cxb5#
- 1...Rc6+
- 2.Sxc6#
- 1...Rc7
- 2.c5#
- 1...Rc8
- 2.c5#
- 1...Bg1
- 2.Qf4#
- 1...Bg3
- 2.Sxf3#
- 1...Bf4
- 2.Qxf4#
- 1...Bxe5
- 2.Qd3#
- 1...exf2
- 2.Bxf2#
- 1...dxc4
- 2.Qe4#
- 1...Rg3
- Tries
- 1.Kh5?
- 1...Rxc4
- 2.Sc6#
- 1...Bxe5
- 2.Qd3#
- 1...exf2
- 2.Bxf2#
- 1...dxc4
- 2.Qe4#
- 1...Rg3
- 2.Qf4#
- 1...Rb5
- 2.Sc6#
- 2.cxb5#
- 1...Rc6
- 2.Sxc6#
- 2.c5#
- 1...Rc7
- 2.c5#
- 1...Rc8
- 2.c5#
- 1...Bg1
- 2.Qf4#
- 1...Bg3
- 2.Sxf3#
- 1...Bf4
- 2.Qxf4#
- 1...h6!
- 1...Rxc4
- 1.Kxh7?
- 1...Rxc4
- 2.Sc6#
- 1...Bxe5
- 2.Qd3#
- 1...exf2
- 2.Bxf2#
- 1...dxc4
- 2.Qe4#
- 1...Rg3
- 2.Qf4#
- 1...Rb5
- 2.Sc6#
- 2.cxb5#
- 1...Rc6
- 2.Sxc6#
- 2.c5#
- 1...Rc8
- 2.c5#
- 1...Bg1
- 2.Qf4#
- 1...Bg3
- 2.Sxf3#
- 1...Bf4
- 2.Qxf4#
- 1...Rc7+!
- 1...Rxc4
- 1.Sg4?
- threat
- 2.Qd3#
- 2.fxe3#
- 1...exf2
- 2.Bxf2#
- 2.Qd3#
- 1...Bg1
- 2.Qd3#
- 2.Qf4#
- 2.Qe5#
- 2.Qf6#
- 1...Bf4
- 2.Qd3#
- 2.Qxf4#
- 1...Rc6+!
- threat
- 1.Sxc5?
- threat
- 2.Sb3#
- 2.Se6#
- 1...exf2
- 2.Bxf2#
- 1...dxc4
- 2.Sc6#
- 1...Kxc5!
- threat
- 1.Bb1?
- 1...Rc6+
- 2.Sxc6#
- 1...Rxc4
- 2.Sc6#
- 1...Bxe5
- 2.Qd3#
- 1...exf2
- 2.Bxf2#
- 1...dxc4
- 2.Qe4#
- 1...Rg3
- 2.Qf4#
- 1...Rb5
- 2.Sc6#
- 2.cxb5#
- 1...Rc7
- 2.c5#
- 1...Rc8
- 2.c5#
- 1...Bg1
- 2.Qf4#
- 1...Bg3
- 2.Sxf3#
- 1...Bf4
- 2.Qxf4#
- 1...c2!
- 1...Rc6+
- 1.Qg4+?
- 1...Bf4
- 2.Qxf4#
- 1...Kxe5!
- 1...Bf4
- 1.cxd5+?
- 1...Rc4
- 2.Sc6#
- 2.Qe4#
- 1...Kxd5!
- 1...Rc4
- 1.g6?
- 1...Bf4+
- 2.Qxf4#
- 1...Rxc4
- 2.Sc6#
- 1...Bxe5
- 2.Qd3#
- 1...exf2
- 2.Bxf2#
- 1...dxc4
- 2.Qe4#
- 1...Rg3
- 2.Qf4#
- 1...Rb5
- 2.Sc6#
- 2.cxb5#
- 1...Rc6
- 2.Sxc6#
- 2.c5#
- 1...Rc7
- 2.c5#
- 1...Rc8
- 2.c5#
- 1...Bg1
- 2.Qf4#
- 1...Bg3
- 2.Sxf3#
- 1...hxg6!
- 1...Bf4+
- 1.Kh5?
- Keys
- 1.Qxf3!
- 1...Rc6+
- 2.Sxc6#
- 1...Kxe5
- 2.Qf6#
- 1...Rxf3
- 2.Sxf3#
- 1...Rxc4
- 2.Sc6#
- 1...Bxe5
- 2.fxe3#
- 1...exf2
- 2.Bxc3#
- 1...dxc4
- 2.Qe4#
- 1...Rg3
- 2.Qf4#
- 1...Rb5
- 2.Sc6#
- 1...Rc7
- 2.Qxd5#
- 1...Rc8
- 2.Qxd5#
- 1...Bg1
- 2.Qf4#
- 1...Bg3
- 2.Qxe3#
- 1...Bf4
- 2.Qxf4#
- 1...Rc6+
- 1.Qxf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(f);S_CUTB(b)::QAR2(G)
- R(j);N_GUARD,P_SPINR(j),XP(E)::S(F)
- R(j);CHECK,N_GUARD::S(F),XR(j)
- R(j);OGATE::R(D)+P(E)
- B(b);N_GUARD::QAR2(G)
- B(b);S_CUTR(f)::S(F),XP(e)
- B(b);N_GUARD,P_PINP(H)::QAR2(G),XB(b)
- B(b);SBLOCK,XS(F)::QAR1(G)
- P(d);OGATE,XP(C)::B(A),XP(d)
- P(k);N_GUARD,P_SPINP(k),XP(E)::QAR1(G)
- Tries
- Try
- K(J);P-FLIGHT
- Vars
- R(j);N_GUARD,P_SPINR(j),XP(E)::S(F)
- B(b);SBLOCK,XS(F)::QAR1(G)
- P(d);OGATE,XP(C)::B(A),XP(d)
- P(k);N_GUARD,P_SPINP(k),XP(E)::QAR1(G)
- R(f);S_CUTB(b)::QAR2(G)
- R(j);OGATE::R(D)+P(E)
- B(b);N_GUARD::QAR2(G)
- B(b);S_CUTR(f)::S(F),XP(e)
- B(b);N_GUARD::QAR2(G),XB(b)
- Refutation
- P(l);
- Try
- K(J);P-FLIGHT,XP(l)
- Vars
- R(j);N_GUARD,P_SPINR(j),XP(E)::S(F)
- B(b);SBLOCK,XS(F)::QAR1(G)
- P(d);OGATE,XP(C)::B(A),XP(d)
- P(k);N_GUARD,P_SPINP(k),XP(E)::QAR1(G)
- R(f);S_CUTB(b)::QAR2(G)
- R(j);OGATE::R(D)+P(E)
- B(b);N_GUARD::QAR2(G)
- B(b);S_CUTR(f)::S(F),XP(e)
- B(b);N_GUARD::QAR2(G),XB(b)
- Refutation
- R(j);CHECK
- Try
- S(F);
- Threat
- DUALS(2)
- Refutation
- R(j);CHECK
- Try
- S(I);XR(j)
- Threat
- DUALS(2)
- Vars
- P(d);OGATE,XP(C)::B(A),XP(d)
- P(k);P_SPINP(k),XP(E)::S(F)
- Refutation
- K(g);S_FLIGHT,XS(I)
- Try
- B(B);
- Vars
- R(j);CHECK,N_GUARD::S(F),XR(j)
- R(j);N_GUARD,P_SPINR(j),XP(E)::S(F)
- B(b);SBLOCK,XS(F)::QAR1(G)
- P(d);OGATE,XP(C)::B(A),XP(d)
- P(k);N_GUARD,P_SPINP(k),XP(E)::QAR1(G)
- R(f);S_CUTB(b)::QAR2(G)
- R(j);OGATE::R(D)+P(E)
- B(b);N_GUARD::QAR2(G)
- B(b);S_CUTR(f)::S(F),XP(e)
- B(b);N_GUARD,P_PINP(H)::QAR2(G),XB(b)
- Refutation
- P(c);
- Try
- Q(G);CHECK
- Vars
- B(b);N_GUARD,P_PINP(H),P_SPINB(b)::QAR2(G),XB(b)
- Refutation
- K(g);S_FLIGHT,XS(F)
- Try
- P(E);CHECK,XP(k)
- Refutation
- K(g);P-FLIGHT,XP(E)
- Try
- P(H);
- Vars
- B(b);CHECK,N_GUARD::QAR2(G),XB(b)
- R(j);N_GUARD,P_SPINR(j),XP(E)::S(F)
- B(b);SBLOCK,XS(F)::QAR1(G)
- P(d);OGATE,XP(C)::B(A),XP(d)
- P(k);N_GUARD,P_SPINP(k),XP(E)::QAR1(G)
- R(f);S_CUTB(b)::QAR2(G)
- R(j);OGATE::R(D)+P(E)
- B(b);N_GUARD::QAR2(G)
- B(b);S_CUTR(f)::S(F),XP(e)
- Refutation
- P(l);XP(H)
- Try
- Actual
- Q(G);XP(e)
- Vars
- R(j);CHECK,N_GUARD::S(F),XR(j)
- K(g);OGATEB,S_FLIGHT,XS(F)::QAB1(G)
- R(f);XQ(G)::S(F),XR(f)
- R(j);N_GUARD,P_SPINR(j),XP(E)::S(F)
- B(b);SBLOCK,XS(F)::P(C),XP(d)
- P(d);XP(C)::B(A),XP(c)
- P(k);N_GUARD,P_SPINP(k),XP(E)::QAR1(G)
- R(f);S_CUTB(b)::QAR2(G)
- R(j);N_GUARD::S(F)
- R(j);N_GUARD::QAR1(G),XP(k)
- B(b);N_GUARD::QAR2(G)
- B(b);S_CUTR(f)::QAB1(G),XP(d)
- B(b);N_GUARD,P_PINP(H)::QAR2(G),XB(b)
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).