MESON Chess Problem Database
Problem Display
PID: 238643 (3n4/3P4/3PpPRN/2Bpk1pb/1p1p2QP/1p1B3N/1P4Pp/3K2nR w - - 0 1)
Zappas, Byron
Probleemblad, 1981
#2
14 + 11
SOLUTION
- SOUND
- Sets
- 1...Bxg4+
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...Se2
- 2.Qxg5#
- 1...Sf3
- 2.Qg3#
- 1...Sxh3
- 2.Re1#
- 1...Sc6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...gxh4
- 2.Qxh5#
- 1...Bxg4+
- Tries
- 1.Kc1?
- threat
- 2.Qg3#
- 2.Qxd4#
- 2.Qxg5#
- 1...Bxg4
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...Sxh3
- 2.Re1#
- 2.Qxd4#
- 1...gxh4
- 2.Qxh5#
- 2.Qxd4#
- 2.Qf4#
- 2.Qg5#
- 1...Sf3
- 2.Qg3#
- 1...Sc6
- 2.Sf7#
- 2.Qg3#
- 2.Qxg5#
- 1...Sf7
- 2.Sxf7#
- 2.Qg3#
- 2.Qxd4#
- 1...Se2+!
- threat
- 1.Ke1?
- threat
- 2.Qg3#
- 2.Qxd4#
- 2.Qxg5#
- 1...Bxg4
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...Sxh3
- 2.Qxd4#
- 1...gxh4
- 2.Qxh5#
- 2.Qxd4#
- 2.Qf4#
- 2.Qg5#
- 1...Se2
- 2.Qxg5#
- 1...Sc6
- 2.Sf7#
- 2.Qg3#
- 2.Qxg5#
- 1...Sf7
- 2.Sxf7#
- 2.Qg3#
- 2.Qxd4#
- 1...Sf3+!
- threat
- 1.Kd2?
- threat
- 2.Qg3#
- 2.Qxd4#
- 2.Qxg5#
- 1...Bxg4
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...Sxh3
- 2.Re1#
- 2.Qxd4#
- 1...gxh4
- 2.Qxh5#
- 2.Qxd4#
- 2.Qf4#
- 2.Qg5#
- 1...Se2
- 2.Qxg5#
- 1...Sc6
- 2.Sf7#
- 2.Qg3#
- 2.Qxg5#
- 1...Sf7
- 2.Sxf7#
- 2.Qg3#
- 2.Qxd4#
- 1...Sf3+!
- threat
- 1.Sxg5?
- 1...Bxg6
- 2.Qxd4#
- 1...Se2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 2.Qg3#
- 1...Sh3
- 2.Sf3#
- 2.Re1#
- 1...Sc6
- 2.Sgf7#
- 2.Shf7#
- 1...Sb7
- 2.Sgf7#
- 2.Shf7#
- 1...Sf7
- 2.Sgxf7#
- 2.Shxf7#
- 1...Bxg4+!
- 1...Bxg6
- 1.Bb1?
- 1...Bxg4+
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...Sxh3
- 2.Re1#
- 1...gxh4
- 2.Qxh5#
- 1...Se2
- 2.Qxg5#
- 1...Sf3
- 2.Qg3#
- 1...Sc6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...d3!
- 1...Bxg4+
- 1.Bxb4?
- 1...Bxg4+
- 2.Sxg4#
- 1...Sxh3
- 2.Re1#
- 1...gxh4
- 2.Qxh5#
- 1...Se2
- 2.Qxg5#
- 1...Sf3
- 2.Qg3#
- 1...Sc6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Bxg6!
- 1...Bxg4+
- 1.Rxh2?
- 1...Bxg4+
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...gxh4
- 2.Qxh5#
- 1...Se2
- 2.Qxg5#
- 1...Sf3
- 2.Qg3#
- 1...Sc6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sxh3!
- 1...Bxg4+
- 1.Qxh5?
- threat
- 2.Sg4#
- 2.Qxg5#
- 1...Sf3
- 2.Sg4#
- 1...Sf7
- 2.Sg4#
- 2.Sxf7#
- 1...Sxh3!
- threat
- 1.g3?
- 1...Bxg4+
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...Sxh3
- 2.Re1#
- 1...gxh4
- 2.Qxh5#
- 1...Se2
- 2.Qxg5#
- 1...Sc6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sf3!
- 1...Bxg4+
- 1.hxg5?
- 1...Bxg4+
- 2.Sxg4#
- 1...Bxg6
- 2.Qg3#
- 2.Qxd4#
- 2.Qf4#
- 1...Sxh3
- 2.Re1#
- 1...Sf3
- 2.Qg3#
- 2.Qf4#
- 1...Sc6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Se2!
- 1...Bxg4+
- 1.Kc1?
- Keys
- 1.f7!
- 1...Bxg4+
- 2.Sxg4#
- 1...Bxg6
- 2.Qxd4#
- 1...Sxh3
- 2.Re1#
- 1...Sxf7
- 2.Sxf7#
- 2.Rxe6#
- 1...gxh4
- 2.Qxh5#
- 1...Se2
- 2.Qxg5#
- 1...Sf3
- 2.Qg3#
- 1...Sc6
- 2.Rxe6#
- 1...Sb7
- 2.Rxe6#
- 1...Bxg4+
- 1.f7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- B(i);CHECK,XQ(G)::S(M),XB(i)
- B(i);N_PINQ(G),XR(L)::QAB1(G),XP(e)
- S(a);N_PINQ(G)::QAR2(G),XP(h)
- S(a);N_PINQ(G)::QAB(G)
- S(a);OGATE,XS(F)::R(B)
- S(k);N_GUARD::S(M)
- S(k);N_GUARD::S(M),XS(k)
- P(h);XP(H)::QAR(G),XB(i)
- Tries
- Try
- K(A);N_SPINQ(G),P-FLIGHT
- Threat
- DUALS(3)
- Vars
- B(i);XQ(G)::S(M),XB(i)
- B(i);XR(L)::QAB1(G),XP(e)
- S(a);::QAB(G)
- Refutation
- S(a);CHECK
- Try
- K(A);N_SPINQ(G),P-FLIGHT
- Threat
- DUALS(3)
- Vars
- B(i);XQ(G)::S(M),XB(i)
- B(i);XR(L)::QAB1(G),XP(e)
- S(a);XS(F)::QAB1(G),XP(e)
- S(a);::QAR2(G),XP(h)
- Refutation
- S(a);CHECK
- Try
- K(A);N_SPINQ(G),P-FLIGHT
- Threat
- DUALS(3)
- Vars
- B(i);XQ(G)::S(M),XB(i)
- B(i);XR(L)::QAB1(G),XP(e)
- S(a);::QAR2(G),XP(h)
- Refutation
- S(a);CHECK
- Try
- S(F);XP(h)
- Vars
- B(i);N_PINQ(G),XR(L)::QAB1(G),XP(e)
- S(a);N_GUARD,N_PINQ(G)::S(F)
- Refutation
- B(i);CHECK,XQ(G)
- Try
- B(E);
- Vars
- B(i);CHECK,XQ(G)::S(M),XB(i)
- B(i);N_PINQ(G),XR(L)::QAB1(G),XP(e)
- S(a);OGATE,XS(F)::R(B)
- P(h);XP(H)::QAR(G),XB(i)
- S(a);N_PINQ(G)::QAR2(G),XP(h)
- S(a);N_PINQ(G)::QAB(G)
- S(k);N_GUARD::S(M)
- S(k);N_GUARD::S(M),XS(k)
- Refutation
- P(e);
- Try
- B(I);XP(d)
- Vars
- B(i);CHECK,XQ(G)::S(M),XB(i)
- S(a);OGATE,XS(F)::R(B)
- P(h);XP(H)::QAR(G),XB(i)
- S(a);N_PINQ(G)::QAR2(G),XP(h)
- S(a);N_PINQ(G)::QAB(G)
- S(k);N_GUARD::S(M)
- S(k);N_GUARD::S(M),XS(k)
- Refutation
- B(i);N_PINQ(G),XR(L)
- Try
- R(B);XP(b)
- Vars
- B(i);CHECK,XQ(G)::S(M),XB(i)
- B(i);N_PINQ(G),XR(L)::QAB1(G),XP(e)
- P(h);XP(H)::QAR(G),XB(i)
- S(a);N_PINQ(G)::QAR2(G),XP(h)
- S(a);N_PINQ(G)::QAB(G)
- S(k);N_GUARD::S(M)
- S(k);N_GUARD::S(M),XS(k)
- Refutation
- S(a);XS(F)
- Try
- Q(G);N_SPINQ(G),P_PINP(h),XB(i)
- Threat
- DUALS(2)
- Vars
- S(a);::S(M)
- Refutation
- S(a);XS(F)
- Try
- P(D);
- Vars
- B(i);CHECK,XQ(G)::S(M),XB(i)
- B(i);N_PINQ(G),XR(L)::QAB1(G),XP(e)
- S(a);OGATE,XS(F)::R(B)
- P(h);XP(H)::QAR(G),XB(i)
- S(a);N_PINQ(G)::QAR2(G),XP(h)
- S(k);N_GUARD::S(M)
- S(k);N_GUARD::S(M),XS(k)
- Refutation
- S(a);N_PINQ(G)
- Try
- P(H);XP(h)
- Vars
- B(i);CHECK,XQ(G)::S(M),XB(i)
- S(a);OGATE,XS(F)::R(B)
- S(k);N_GUARD::S(M)
- S(k);N_GUARD::S(M),XS(k)
- Refutation
- S(a);N_PINQ(G)
- Try
- Actual
- P(K);
- Vars
- B(i);CHECK,XQ(G)::S(M),XB(i)
- B(i);N_PINQ(G),XR(L)::QAB1(G),XP(e)
- S(a);OGATE,XS(F)::R(B)
- P(h);XP(H)::QAR(G),XB(i)
- S(a);N_PINQ(G)::QAR2(G),XP(h)
- S(a);N_PINQ(G)::QAB(G)
- S(k);N_GUARD::R1(L),XP(j)
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).