MESON Chess Problem Database
Problem Display
PID: 11536 (Q3R2B/1B2n2N/3pbn2/4krqR/2p3P1/2b1P1Pp/3N1p2/5K2 w - - 0 1)
Walters, S
Chess, 1939
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxe3
- 2.Bxf6#
- 1...Qf4
- 2.Bxf6#
- 2.gxf4#
- 1...Qh4
- 2.Sf3#
- 1...Qh6
- 2.Sf3#
- 1...Qxg4
- 2.Bxf6#
- 1...Qg6
- 2.Sf3#
- 1...Qg7
- 2.Sf3#
- 1...Qg8
- 2.Sf3#
- 2.Bxf6#
- 1...Rf3
- 2.Sxf3#
- 1...Rf4
- 2.gxf4#
- 1...Sg6
- 2.Sxc4#
- 1...Sc8
- 2.Sxc4#
- 1...Sg8
- 2.Sxc4#
- 1...d5
- 2.Qb8#
- 1...Qxe3
- Tries
- 1.Bg2?
- threat
- 2.Qe4#
- 1...Qxe3
- 2.Bxf6#
- 1...Qxg4
- 2.Bxf6#
- 1...Bd5
- 2.Qxd5#
- 1...d5
- 2.Qb8#
- 1...Qf4
- 2.Bxf6#
- 2.gxf4#
- 1...Qg7
- 2.Sf3#
- 1...Rf4
- 2.gxf4#
- 1...Sd5
- 2.Sxc4#
- 2.Qxd5#
- 1...Sc6
- 2.Sxc4#
- 1...hxg2+!
- threat
- 1.Bf3?
- threat
- 2.Qe4#
- 1...Qxe3
- 2.Bxf6#
- 1...Qxg4
- 2.Bxf6#
- 1...Bd5
- 2.Qxd5#
- 1...d5
- 2.Qb8#
- 1...Qf4
- 2.Bxf6#
- 2.gxf4#
- 1...Rf4
- 2.gxf4#
- 1...Sd5
- 2.Sxc4#
- 2.Qxd5#
- 1...Sc6
- 2.Sxc4#
- 1...Qg7!
- threat
- 1.Bxf6+?
- 1...Qxf6
- 2.Sf3#
- 1...Rxf6!
- 1...Qxf6
- 1.Rxe7?
- threat
- 2.Sxc4#
- 1...Qxe3
- 2.Bxf6#
- 1...Qxg4
- 2.Bxf6#
- 1...d5
- 2.Qb8#
- 1...Qf4
- 2.Bxf6#
- 2.gxf4#
- 1...Rf4
- 2.gxf4#
- 1...Bxd2!
- threat
- 1.Qa5+?
- 1...Bd5
- 2.Rxe7#
- 2.Qxd5#
- 1...Sd5
- 2.Qxd5#
- 1...d5
- 2.Qc7#
- 1...Bxa5!
- 1...Bd5
- 1.Bg2?
- Keys
- 1.Bh1!
- threat
- 2.Qe4#
- 1...Qxe3
- 2.Bxf6#
- 1...Qxg4
- 2.Bxf6#
- 1...Bd5
- 2.Qxd5#
- 1...d5
- 2.Qb8#
- 1...Qf4
- 2.Bxf6#
- 2.gxf4#
- 1...Qg7
- 2.Sf3#
- 1...Rf4
- 2.gxf4#
- 1...Sd5
- 2.Sxc4#
- 2.Qxd5#
- 1...Sc6
- 2.Sxc4#
- threat
- 1.Bh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(g);N_GUARD,P_SPINR(f),XP(C)::B(K),XS(j)
- Q(g);P_SPINR(f)::S(B)
- Q(g);N_GUARD,P_SPINR(f),XP(E)::B(K),XS(j)
- Q(g);N_SPINS(j),P_SPINR(f)::S(B)
- R(f);N_GUARD,P_SPINQ(g)::S(B),XR(f)
- R(f);OGATE,P_SPINQ(g)::P(D),XR(f)
- S(k);P_SPINB(i)::S(B),XP(d)
- P(h);OGATEB::QAB(I)
- Tries
- Try
- B(G);
- Threat
- QAR1(I)
- Vars
- Q(g);N_GUARD,P_SPINR(f),XP(C)::B(K),XS(j)
- Q(g);N_GUARD,P_SPINR(f),XP(E)::B(K),XS(j)
- B(i);N_GUARD,S_CUTS(k)::QAR1(I),XB(i)
- P(h);OGATEB::QAB(I)
- Q(g);N_SPINS(j),P_SPINR(f)::S(B)
- R(f);OGATE,P_SPINQ(g)::P(D),XR(f)
- S(k);P_SPINB(i)::S(B),XP(d)
- Refutation
- P(c);CHECK,XB(G)
- Try
- B(G);
- Threat
- QAR1(I)
- Vars
- Q(g);N_GUARD,P_SPINR(f),XP(C)::B(K),XS(j)
- Q(g);N_GUARD,P_SPINR(f),XP(E)::B(K),XS(j)
- B(i);N_GUARD,S_CUTS(k)::QAR1(I),XB(i)
- P(h);OGATEB::QAB(I)
- R(f);OGATE,P_SPINQ(g)::P(D),XR(f)
- S(k);P_SPINB(i)::S(B),XP(d)
- Refutation
- Q(g);N_SPINS(j),P_SPINR(f)
- Try
- B(K);CHECK,XS(j)
- Vars
- Q(g);P_SPINR(f),XB(K)::S(B)
- Refutation
- R(f);P_SPINQ(g),XB(K)
- Try
- R(J);P_PINB(i),XS(k)
- Threat
- S(B),XP(d)
- Vars
- Q(g);N_GUARD,P_SPINR(f),XP(C)::B(K),XS(j)
- Q(g);N_GUARD,P_SPINR(f),XP(E)::B(K),XS(j)
- P(h);OGATEB::QAB(I)
- R(f);OGATE,P_SPINQ(g)::P(D),XR(f)
- Refutation
- B(b);XS(B)
- Try
- Q(I);CHECK
- Vars
- S(k);N_GUARD,N_SPINS(j),P_SPINB(i),P_SPINS(k)::QAR1(I),XS(k)
- P(h);OGATEB,P_SPINP(h)::QAB(I)
- Refutation
- B(b);XQ(I)
- Try
- Actual
- B(G);
- Threat
- QAR1(I)
- Vars
- Q(g);N_GUARD,P_SPINR(f),XP(C)::B(K),XS(j)
- Q(g);N_GUARD,P_SPINR(f),XP(E)::B(K),XS(j)
- B(i);N_GUARD,S_CUTS(k)::QAR1(I),XB(i)
- P(h);OGATEB::QAB(I)
- Q(g);N_SPINS(j),P_SPINR(f)::S(B)
- R(f);OGATE,P_SPINQ(g)::P(D),XR(f)
- S(k);P_SPINB(i)::S(B),XP(d)
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).