MESON Chess Problem Database
Problem Display
PID: 12469 (8/5p2/2pp1K2/R1bpPP2/P2kBp2/pR1P1P2/P5N1/1bQnN3 w - - 0 1)
Zappas, Byron
1st Prize, The Problemist, 1979/II
#2
13 + 10
| 56 | The Problemist | 1980 |
| 3750 | FIDE Album (1977-1979) | 1984 |
| 273 | Mat Plus | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Bxa2
- 2.Sc2#
- 1...Bc2
- 2.Sxc2#
- 1...Bxd3
- 2.Rxd3#
- 1...Bb4
- 2.Rxb4#
- 1...Bb6
- 2.Rb4#
- 1...Ba7
- 2.Rb4#
- 1...Sb2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...dxe4
- 2.Qc4#
- 1...dxe5
- 2.Qxc5#
- 1...Bxa2
- Tries
- 1.Rab5?
- 1...Bxa2
- 2.Sc2#
- 1...Bxd3
- 2.Rxd3#
- 1...dxe4
- 2.Qc4#
- 1...dxe5
- 2.Qxc5#
- 1...Sb2
- 2.Qc3#
- 1...Bc2
- 2.Sxc2#
- 1...Bb4
- 2.R3xb4#
- 2.R5xb4#
- 1...Bb6
- 2.R3b4#
- 2.R5b4#
- 1...Ba7
- 2.R3b4#
- 2.R5b4#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...cxb5!
- 1...Bxa2
- 1.Ra6?
- 1...Bxa2
- 2.Sc2#
- 1...Bxd3
- 2.Rxd3#
- 1...dxe4
- 2.Qc4#
- 1...Sb2
- 2.Qc3#
- 1...Bc2
- 2.Sxc2#
- 1...Bb4
- 2.Rxb4#
- 1...Bb6
- 2.Rb4#
- 1...Ba7
- 2.Rb4#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...dxe5!
- 1...Bxa2
- 1.Ra7?
- 1...Bxa2
- 2.Sc2#
- 1...Bxd3
- 2.Rxd3#
- 1...Bxa7
- 2.Rb4#
- 1...dxe4
- 2.Qc4#
- 1...Sb2
- 2.Qc3#
- 1...Bc2
- 2.Sxc2#
- 1...Bb4
- 2.Rxb4#
- 1...Bb6
- 2.Rb4#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...dxe5!
- 1...Bxa2
- 1.Ra8?
- 1...Bxa2
- 2.Sc2#
- 1...Bxd3
- 2.Rxd3#
- 1...dxe4
- 2.Qc4#
- 1...Sb2
- 2.Qc3#
- 1...Bc2
- 2.Sxc2#
- 1...Bb4
- 2.Rxb4#
- 1...Bb6
- 2.Rb4#
- 1...Ba7
- 2.Rb4#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...dxe5!
- 1...Bxa2
- 1.Qxb1?
- threat
- 2.Sc2#
- 1...Se3
- 2.Qa1#
- 1...dxe4!
- threat
- 1.Qc2?
- 1...Bxc2
- 2.Sxc2#
- 1...dxe4
- 2.Qc4#
- 1...dxe5
- 2.Qxc5#
- 1...Sb2
- 2.Qf2#
- 2.Qc3#
- 1...Bb4
- 2.Rxb4#
- 1...Bb6
- 2.Rb4#
- 1...Ba7
- 2.Rb4#
- 1...Sf2
- 2.Qxf2#
- 2.Qc3#
- 1...Sc3
- 2.Qf2#
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...Bxa2!
- 1...Bxc2
- 1.exd6?
- threat
- 2.Qxc5#
- 1...Bc2
- 2.Sxc2#
- 1...Bb4
- 2.Rxb4#
- 1...Bb6
- 2.Rb4#
- 1...Ba7
- 2.Rb4#
- 1...Sc3
- 2.Qxc3#
- 1...Bxd6!
- threat
- 1.e6?
- 1...Bxa2
- 2.Sc2#
- 1...Bxd3
- 2.Rxd3#
- 1...dxe4
- 2.Qc4#
- 1...Sb2
- 2.Qc3#
- 1...Bc2
- 2.Sxc2#
- 1...Bb4
- 2.Rxb4#
- 1...Bb6
- 2.Rb4#
- 1...Ba7
- 2.Rb4#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qc3#
- 1...fxe6!
- 1...Bxa2
- 1.Rab5?
- Keys
- 1.Qxf4!
- 1...Bxa2
- 2.Sc2#
- 1...Bxd3
- 2.Bxd3#
- 1...dxe4
- 2.Qxe4#
- 1...dxe5
- 2.Qxe5#
- 1...Sb2
- 2.Qe3#
- 1...Bc2
- 2.Sxc2#
- 1...Bb4
- 2.Bxd5#
- 1...Bb6
- 2.Bxd5#
- 1...Ba7
- 2.Bxd5#
- 1...Sf2
- 2.Qe3#
- 1...Sc3
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Bxa2
- 1.Qxf4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 10
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD,XP(C)::S(B)
- B(a);N_GUARD::S(B),XB(a)
- B(a);OGATE,XP(F)::R1(E),XB(a)
- B(f);N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- S(b);N_GUARD::QAB1(A)
- S(b);N_GUARD::QAB1(A),XS(b)
- P(g);N_GUARD,XB(I)::QAR1(A)
- P(i);N_GUARD,XP(K)::QAB1(A),XB(f)
- Tries
- Try
- R(J);
- Vars
- B(a);N_GUARD,XP(C)::S(B)
- B(a);OGATE,XP(F)::R1(E),XB(a)
- P(g);N_GUARD,XB(I)::QAR1(A)
- P(i);N_GUARD,XP(K)::QAB1(A),XB(f)
- S(b);N_GUARD::QAB1(A)
- B(a);N_GUARD::S(B),XB(a)
- S(b);N_GUARD::QAB1(A),XS(b)
- Refutation
- P(h);XR(J)
- Try
- R(J);
- Vars
- B(a);N_GUARD,XP(C)::S(B)
- B(a);OGATE,XP(F)::R1(E),XB(a)
- P(g);N_GUARD,XB(I)::QAR1(A)
- S(b);N_GUARD::QAB1(A)
- B(a);N_GUARD::S(B),XB(a)
- B(f);N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- S(b);N_GUARD::QAB1(A),XS(b)
- Refutation
- P(i);XP(K)
- Try
- R(J);
- Vars
- B(a);N_GUARD,XP(C)::S(B)
- B(a);OGATE,XP(F)::R1(E),XB(a)
- B(f);N_GUARD,XR(J)::R(E)
- P(g);N_GUARD,XB(I)::QAR1(A)
- S(b);N_GUARD::QAB1(A)
- B(a);N_GUARD::S(B),XB(a)
- B(f);N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- S(b);N_GUARD::QAB1(A),XS(b)
- Refutation
- P(i);XP(K)
- Try
- R(J);
- Vars
- B(a);N_GUARD,XP(C)::S(B)
- B(a);OGATE,XP(F)::R1(E),XB(a)
- P(g);N_GUARD,XB(I)::QAR1(A)
- S(b);N_GUARD::QAB1(A)
- B(a);N_GUARD::S(B),XB(a)
- B(f);N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- S(b);N_GUARD::QAB1(A),XS(b)
- Refutation
- P(i);XP(K)
- Try
- Q(A);XB(a)
- Threat
- S(B)
- Vars
- S(b);N_GUARD::QAB(A)
- Refutation
- P(g);XB(I)
- Try
- Q(A);
- Vars
- B(a);XQ(A)::S(B),XB(a)
- P(g);N_GUARD,XB(I)::QAR1(A)
- P(i);N_GUARD,XP(K)::QAB1(A),XB(f)
- B(f);N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- S(b);N_GUARD::QAB1(A)
- Refutation
- B(a);XP(C)
- Try
- P(K);XP(i)
- Threat
- QAB1(A),XB(f)
- Vars
- B(a);N_GUARD::S(B),XB(a)
- B(f);N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- S(b);N_GUARD::QAB1(A),XS(b)
- Refutation
- B(f);XP(K)
- Try
- P(K);
- Vars
- B(a);N_GUARD,XP(C)::S(B)
- B(a);OGATE,XP(F)::R1(E),XB(a)
- P(g);N_GUARD,XB(I)::QAR1(A)
- S(b);N_GUARD::QAB1(A)
- B(a);N_GUARD::S(B),XB(a)
- B(f);N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- S(b);N_GUARD::QAB1(A),XS(b)
- Refutation
- P(j);XP(K)
- Try
- Actual
- Q(A);XP(e)
- Vars
- B(a);N_GUARD,XP(C)::S(B)
- B(a);OGATE,XP(F)::QAR(A)+B(I),XB(a)
- P(g);OGATE,P_SPINP(g),XB(I)::QAR1(A),XP(g)
- P(i);OGATE,XP(K)::QAB1(A),XP(i)
- S(b);N_GUARD::QAB1(A)
- B(a);N_GUARD::S(B),XB(a)
- B(f);::QAR(A)+B(I),XP(g)
- S(b);N_GUARD::QAB1(A),XS(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).