MESON Chess Problem Database
Problem Display
PID: 68368 (3rN3/1BR1n3/N1b1Pp2/3k4/1ppp1P2/1n4p1/1Q4pr/3KR1B1 w - - 0 1)
Lewis, Robert Tony
Chess, 1949
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Qxg2#
- 1...Rh3
- 2.Qxg2#
- 1...Rh4
- 2.Qxg2#
- 1...Rh5
- 2.Qxg2#
- 1...Rh6
- 2.Qxg2#
- 1...Rh7
- 2.Qxg2#
- 1...Rh8
- 2.Qxg2#
- 1...Rd6
- 2.Sxf6#
- 1...Rd7
- 2.Rxd7#
- 1...Ra8
- 2.Rd7#
- 1...Rb8
- 2.Rd7#
- 1...Rc8
- 2.Rd7#
- 1...Rxe8
- 2.Rd7#
- 1...Bxb7
- 2.Sxb4#
- 1...Sa1
- 2.Qxd4#
- 1...Sc1
- 2.Qxd4#
- 1...Sd2
- 2.Qxd4#
- 1...Sa5
- 2.Qxd4#
- 1...Sc5
- 2.Sxb4#
- 2.Qxd4#
- 1...Sf5
- 2.Bxc6#
- 1...Sg6
- 2.Bxc6#
- 1...Sc8
- 2.Bxc6#
- 1...Sg8
- 2.Bxc6#
- 1...c3
- 2.Qxb3#
- 1...d3
- 2.Sxb4#
- 1...f5
- 2.Re5#
- 1...Rh1
- Tries
- 1.Ba8?
- 1...Rxe8
- 2.Rd7#
- 1...Bxa8
- 2.Sxb4#
- 1...c3
- 2.Qxb3#
- 1...Rh1
- 2.Qxg2#
- 1...Rh3
- 2.Qxg2#
- 1...Rh4
- 2.Qxg2#
- 1...Rh5
- 2.Qxg2#
- 1...Rh6
- 2.Qxg2#
- 1...Rh7
- 2.Qxg2#
- 1...Rh8
- 2.Qxg2#
- 1...Rd6
- 2.Sxf6#
- 1...Rd7
- 2.Rxd7#
- 1...Rb8
- 2.Rd7#
- 1...Rc8
- 2.Rd7#
- 1...Bb7
- 2.Sxb4#
- 1...Sa1
- 2.Qxd4#
- 1...Sc1
- 2.Qxd4#
- 1...Sd2
- 2.Qxd4#
- 1...Sa5
- 2.Qxd4#
- 1...Sc5
- 2.Sxb4#
- 2.Qxd4#
- 1...Sf5
- 2.Bxc6#
- 1...Sg6
- 2.Bxc6#
- 1...Sc8
- 2.Bxc6#
- 1...Sg8
- 2.Bxc6#
- 1...d3
- 2.Sxb4#
- 1...f5
- 2.Re5#
- 1...Rxa8!
- 1...Rxe8
- 1.Rxc6?
- threat
- 2.Sxb4#
- 2.Sac7#
- 2.Sxf6#
- 2.Sec7#
- 2.Rc5#
- 2.Rd6#
- 1...Rxe8
- 2.Sxb4#
- 2.Sc7#
- 1...Rh6
- 2.Sxb4#
- 2.Sac7#
- 2.Sec7#
- 2.Rc5#
- 2.Rd6#
- 2.Qxg2#
- 1...Rd6
- 2.Sxb4#
- 2.Sac7#
- 2.Sxf6#
- 2.Sec7#
- 2.Rc5#
- 2.Rxd6#
- 1...Rd7
- 2.Sxb4#
- 2.Sxf6#
- 2.Rc5#
- 2.Rd6#
- 1...Rc8
- 2.Sxb4#
- 2.Sxf6#
- 2.Rc5#
- 2.Rd6#
- 1...Sc5
- 2.Sxb4#
- 2.Sac7#
- 2.Sxf6#
- 2.Sec7#
- 2.Rxc5#
- 2.Rd6#
- 2.Qxd4#
- 1...Sg8
- 2.Sxb4#
- 2.Sac7#
- 2.Sec7#
- 2.Rc5#
- 2.Rb6#
- 2.Rd6#
- 2.Rc7#
- 2.Rc8#
- 1...c3
- 2.Sxb4#
- 2.Sac7#
- 2.Sxf6#
- 2.Sec7#
- 2.Rc5#
- 2.Qxb3#
- 1...f5
- 2.Sxb4#
- 2.Sac7#
- 2.Sf6#
- 2.Sec7#
- 2.Re5#
- 2.Rc5#
- 2.Rd6#
- 1...Sxc6!
- threat
- 1.Rxe7?
- 1...Rxe8
- 2.Rd7#
- 1...c3
- 2.Qxb3#
- 1...Rh1
- 2.Qxg2#
- 1...Rh3
- 2.Qxg2#
- 1...Rh4
- 2.Qxg2#
- 1...Rh5
- 2.Qxg2#
- 1...Rh6
- 2.Qxg2#
- 1...Rh7
- 2.Qxg2#
- 1...Rh8
- 2.Qxg2#
- 1...Rd6
- 2.Sxf6#
- 2.Sec7#
- 1...Rd7
- 2.Rxd7#
- 1...Ra8
- 2.Rd7#
- 1...Rb8
- 2.Rd7#
- 1...Rc8
- 2.Rd7#
- 1...Sa1
- 2.Qxd4#
- 1...Sc1
- 2.Qxd4#
- 1...Sd2
- 2.Qxd4#
- 1...Sa5
- 2.Qxd4#
- 1...Sc5
- 2.Sxb4#
- 2.Sac7#
- 2.Qxd4#
- 1...d3
- 2.Sxb4#
- 2.Sac7#
- 1...f5
- 2.Re5#
- 1...Bxb7!
- 1...Rxe8
- 1.Qc3?
- threat
- 2.Qf3#
- 1...Rxe8
- 2.Rd7#
- 1...dxc3
- 2.Sxb4#
- 1...Sd2
- 2.Qxd4#
- 1...Sc5
- 2.Sxb4#
- 2.Qxd4#
- 1...d3
- 2.Sxb4#
- 1...bxc3!
- threat
- 1.Qb1?
- threat
- 2.Qe4#
- 1...Rxe8
- 2.Rd7#
- 1...c3
- 2.Qxb3#
- 1...Sc5
- 2.Sxb4#
- 1...d3
- 2.Sxb4#
- 1...f5
- 2.Re5#
- 1...Sd2!
- threat
- 1.Qc2?
- threat
- 2.Qe4#
- 1...Rxe8
- 2.Rd7#
- 1...c3
- 2.Qxb3#
- 1...Sc5
- 2.Sxb4#
- 1...d3
- 2.Sxb4#
- 1...f5
- 2.Re5#
- 1...Sd2!
- threat
- 1.Qxb3?
- threat
- 2.Qf3#
- 1...Rxe8
- 2.Rd7#
- 1...d3
- 2.Sxb4#
- 1...cxb3!
- threat
- 1.f5?
- 1...Rxe8
- 2.Rd7#
- 1...Bxb7
- 2.Sxb4#
- 1...Sxf5
- 2.Bxc6#
- 1...c3
- 2.Qxb3#
- 1...Sd2
- 2.Qxd4#
- 1...Rh1
- 2.Qxg2#
- 1...Rh3
- 2.Qxg2#
- 1...Rh5
- 2.Qxg2#
- 1...Rh6
- 2.Qxg2#
- 1...Rh7
- 2.Qxg2#
- 1...Rh8
- 2.Qxg2#
- 1...Rd6
- 2.Sxf6#
- 1...Rd7
- 2.Rxd7#
- 1...Ra8
- 2.Rd7#
- 1...Rb8
- 2.Rd7#
- 1...Rc8
- 2.Rd7#
- 1...Sa1
- 2.Qxd4#
- 1...Sc1
- 2.Qxd4#
- 1...Sa5
- 2.Qxd4#
- 1...Sc5
- 2.Sxb4#
- 2.Qxd4#
- 1...Sg6
- 2.Bxc6#
- 1...Sc8
- 2.Bxc6#
- 1...Sg8
- 2.Bxc6#
- 1...d3
- 2.Sxb4#
- 1...Rh4!
- 1...Rxe8
- 1.Ba8?
- Keys
- 1.Qa2!
- 1...Rxe8
- 2.Rd7#
- 1...Bxb7
- 2.Sxb4#
- 1...c3
- 2.Qxb3#
- 1...Rh1
- 2.Qxg2#
- 1...Rh3
- 2.Qxg2#
- 1...Rh4
- 2.Qxg2#
- 1...Rh5
- 2.Qxg2#
- 1...Rh6
- 2.Qxg2#
- 1...Rh7
- 2.Qxg2#
- 1...Rh8
- 2.Qxg2#
- 1...Rd6
- 2.Sxf6#
- 1...Rd7
- 2.Rxd7#
- 1...Ra8
- 2.Rd7#
- 1...Rb8
- 2.Rd7#
- 1...Rc8
- 2.Rd7#
- 1...Sa1
- 2.Qa5#
- 1...Sc1
- 2.Qa5#
- 1...Sd2
- 2.Qa5#
- 1...Sa5
- 2.Qxa5#
- 1...Sc5
- 2.Sxb4#
- 1...Sf5
- 2.Bxc6#
- 1...Sg6
- 2.Bxc6#
- 1...Sc8
- 2.Bxc6#
- 1...Sg8
- 2.Bxc6#
- 1...d3
- 2.Sxb4#
- 1...f5
- 2.Re5#
- 1...Rxe8
- 1.Qa2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::QAB(D),XP(a)
- R(l);SBLOCK::S(J),XP(j)
- R(l);N_GUARD::R(I),XR(l)
- R(l);N_GUARD::R(I)
- R(l);N_GUARD,XS(J)::R(I)
- B(i);N_SPINB(i),XB(H)::S(F),XP(e)
- S(c);N_GUARD::QAR1(D),XP(g)
- S(k);N_GUARD::B(H),XB(i)
- P(f);OGATEB::QAB(D),XS(c)
- P(g);::S(F),XP(e)
- P(j);N_GUARD::R1(B)
- Tries
- Try
- B(H);
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- B(i);N_SPINB(i),XB(H)::S(F),XP(e)
- P(f);OGATEB::QAB(D),XS(c)
- R(b);N_GUARD::QAB(D),XP(a)
- R(l);SBLOCK::S(J),XP(j)
- R(l);N_GUARD::R(I),XR(l)
- R(l);N_GUARD::R(I)
- B(i);::S(F),XP(e)
- S(c);N_GUARD::QAR1(D),XP(g)
- S(k);N_GUARD::B(H),XB(i)
- P(g);::S(F),XP(e)
- P(j);N_GUARD::R1(B)
- Refutation
- R(l);N_SPINB(i),XB(H)
- Try
- R(I);XB(i)
- Threat
- DUALS(6)
- Refutation
- S(k);P_SPINS(k),XR(I)
- Try
- R(I);XS(k)
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- P(f);OGATEB::QAB(D),XS(c)
- R(b);N_GUARD::QAB(D),XP(a)
- R(l);N_GUARD::R(I),XR(l)
- R(l);N_GUARD::R(I)
- S(c);N_GUARD::QAR1(D),XP(g)
- P(j);N_GUARD::R1(B)
- Refutation
- B(i);N_SPINB(i),XB(H)
- Try
- Q(D);
- Threat
- QAB(D)
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- P(g);XQ(D)::S(F),XP(e)
- S(c);N_GUARD::QAR1(D),XP(g)
- P(g);::S(F),XP(e)
- Refutation
- P(e);XQ(D)
- Try
- Q(D);
- Threat
- QAB1(D)
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- P(f);OGATEB::QAB(D),XS(c)
- S(c);SBLOCK::S(F),XP(e)
- P(g);::S(F),XP(e)
- P(j);N_GUARD::R1(B)
- Refutation
- S(c);
- Try
- Q(D);
- Threat
- QAB1(D)
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- P(f);OGATEB::QAB(D),XS(c)
- S(c);SBLOCK::S(F),XP(e)
- P(g);::S(F),XP(e)
- P(j);N_GUARD::R1(B)
- Refutation
- S(c);
- Try
- Q(D);P_PINP(f),XS(c)
- Threat
- QAB(D)
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- P(g);::S(F),XP(e)
- Refutation
- P(f);N_SPINP(f),XQ(D)
- Try
- P(E);
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- B(i);N_SPINB(i),XB(H)::S(F),XP(e)
- S(k);N_GUARD,XP(E)::B(H),XB(i)
- P(f);OGATEB::QAB(D),XS(c)
- S(c);N_GUARD::QAR1(D),XP(g)
- R(b);N_GUARD::QAB(D),XP(a)
- R(l);SBLOCK::S(J),XP(j)
- R(l);N_GUARD::R(I),XR(l)
- R(l);N_GUARD::R(I)
- S(k);N_GUARD::B(H),XB(i)
- P(g);::S(F),XP(e)
- Refutation
- R(b);
- Try
- Actual
- Q(D);
- Vars
- R(l);N_GUARD,XS(J)::R(I)
- B(i);N_SPINB(i),XB(H)::S(F),XP(e)
- P(f);OGATEB,P_SPINS(c)::QAB(D),XS(c)
- R(b);N_GUARD::QAB(D),XP(a)
- R(l);SBLOCK::S(J),XP(j)
- R(l);N_GUARD::R(I),XR(l)
- R(l);N_GUARD::R(I)
- S(c);N_GUARD,P_SPINP(f)::QAR(D)
- S(c);N_GUARD,P_SPINP(f)::QAR(D),XS(c)
- S(c);P_SPINP(f),SBLOCK::S(F),XP(e)
- S(k);N_GUARD::B(H),XB(i)
- P(g);::S(F),XP(e)
- P(j);N_GUARD::R1(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).