MESON Chess Problem Database
Problem Display
PID: 61952 (2QN3B/1p5B/rn3p1K/7R/npPk1r1p/qP1NR2b/3PPP1b/8 w - - 0 1)
Zappas, Byron
1st Prize, The Problemist, 1985
#2
13 + 12
| 3748 | FIDE Album (1983-1985) | 1992 |
SOLUTION
- SOUND
- Sets
- 1...Rxf2
- 2.Re4#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Rg4
- 2.Se6#
- 1...Rf5
- 2.Se6#
- 1...Bf1
- 2.Se6#
- 1...Bg2
- 2.Se6#
- 1...Bf5
- 2.Bxf6#
- 1...Be6
- 2.Sxe6#
- 1...Sb2
- 2.Qc5#
- 1...Sc3
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sxc4
- 2.Qxc4#
- 1...Sd5
- 2.Rxd5#
- 1...Sd7
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...Sxc8
- 2.Rd5#
- 1...Rxf2
- Tries
- 1.Se1?
- threat
- 2.Sc2#
- 2.Rd3#
- 1...Qc1
- 2.Rd3#
- 1...Qb2
- 2.Rd3#
- 1...Qa2
- 2.Rd3#
- 1...Rf3
- 2.Sc2#
- 2.Sxf3#
- 2.Re4#
- 1...Rf5
- 2.Sc2#
- 2.Se6#
- 1...Bf5
- 2.Bxf6#
- 1...Sb2
- 2.Sc2#
- 2.Qc5#
- 1...Sc5
- 2.Sc2#
- 2.Qxc5#
- 1...Qxb3!
- threat
- 1.Sb2?
- threat
- 2.Rd3#
- 1...Sxb2
- 2.Qc5#
- 1...Rf3
- 2.Re4#
- 1...Rf5
- 2.Se6#
- 1...Bf5
- 2.Bxf6#
- 1...Sc5
- 2.Qxc5#
- 1...Qxb3!
- threat
- 1.Sxb4?
- threat
- 2.Sc2#
- 2.Rd3#
- 1...Qxb4
- 2.Rd3#
- 1...Qc1
- 2.Rd3#
- 1...Qb2
- 2.Rd3#
- 1...Qa2
- 2.Rd3#
- 1...Rf3
- 2.Sc2#
- 2.Re4#
- 1...Rf5
- 2.Sc2#
- 2.Se6#
- 1...Bf5
- 2.Bxf6#
- 1...Sb2
- 2.Sc2#
- 2.Qc5#
- 1...Sc5
- 2.Sc2#
- 2.Qxc5#
- 1...Qxb3!
- threat
- 1.Sxf4?
- threat
- 2.Bxf6#
- 2.Rd3#
- 2.Re4#
- 1...Qxb3
- 2.Bxf6#
- 2.Re4#
- 1...Sxc4
- 2.Rd3#
- 2.Re4#
- 2.Rd5#
- 2.Qxc4#
- 1...Sxc8
- 2.Rd3#
- 2.Re4#
- 2.Rd5#
- 1...Ra5
- 2.Rd3#
- 2.Re4#
- 1...Bg2
- 2.Sfe6#
- 2.Sde6#
- 2.Bxf6#
- 2.Rd3#
- 1...Bf5
- 2.Bxf6#
- 1...Sb2
- 2.Bxf6#
- 2.Re4#
- 2.Qc5#
- 1...Sc3
- 2.Bxf6#
- 2.Rd3#
- 2.Qc5#
- 1...Sc5
- 2.Bxf6#
- 2.Qxc5#
- 1...Sd5
- 2.Rd3#
- 2.Re4#
- 2.Rxd5#
- 1...Sd7
- 2.Rd3#
- 2.Re4#
- 2.Rd5#
- 1...Sa8
- 2.Rd3#
- 2.Re4#
- 2.Rd5#
- 1...Bxf4+!
- threat
- 1.Sc5?
- threat
- 2.Rd3#
- 1...Qxb3
- 2.Sxb3#
- 1...Sxc5
- 2.Qxc5#
- 1...Rf3
- 2.Re4#
- 1...Rf5
- 2.Sce6#
- 2.Sde6#
- 2.Re4#
- 1...Bf5
- 2.Bxf6#
- 1...Sb2!
- threat
- 1.Ree5?
- threat
- 2.e3#
- 1...Sxc4
- 2.Rd5#
- 2.Qxc4#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Rf5
- 2.Se6#
- 1...Sd5
- 2.Rxd5#
- 1...f5
- 2.Se6#
- 2.Re3#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Bf5!
- threat
- 1.Re6?
- threat
- 2.e3#
- 1...Sxc4
- 2.Qxc4#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Bf5
- 2.Bxf6#
- 1...Sd5
- 2.Rxd5#
- 1...Rf5!
- threat
- 1.Re7?
- threat
- 2.e3#
- 1...Sxc4
- 2.Qxc4#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Bf5
- 2.Bxf6#
- 1...Sd5
- 2.Rxd5#
- 1...Rf5!
- threat
- 1.Re8?
- threat
- 2.e3#
- 1...Sxc4
- 2.Qxc4#
- 1...Rf3
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Bf5
- 2.Bxf6#
- 1...Sd5
- 2.Rxd5#
- 1...Rf5!
- threat
- 1.Rf5?
- threat
- 2.Se6#
- 2.Bxf6#
- 1...Rxf2
- 2.Se6#
- 1...Rxf5
- 2.Se6#
- 1...Bxf5
- 2.Bxf6#
- 1...Sxc4
- 2.Qxc4#
- 1...Sxc8
- 2.Rd5#
- 1...Rf3
- 2.Se6#
- 1...Rg4
- 2.Se6#
- 1...Ra5
- 2.Se6#
- 1...Sc5
- 2.Bxf6#
- 2.Qxc5#
- 1...Sd5
- 2.Rxd5#
- 1...Sd7
- 2.Rd5#
- 1...Sa8
- 2.Rd5#
- 1...Re4!
- threat
- 1.Qf5?
- threat
- 2.Se6#
- 2.Bxf6#
- 1...Rxf2
- 2.Se6#
- 2.Re4#
- 2.Qe4#
- 1...Rxf5
- 2.Se6#
- 1...Bxf5
- 2.Bxf6#
- 1...Sxc4
- 2.Qd5#
- 1...Rf3
- 2.Se6#
- 2.Re4#
- 2.Qe4#
- 1...Re4
- 2.Rxe4#
- 2.Qxe4#
- 1...Rg4
- 2.Se6#
- 1...Ra5
- 2.Se6#
- 1...Sc5
- 2.Bxf6#
- 2.Qxc5#
- 1...Sd5
- 2.Qxd5#
- 1...Sd7
- 2.Qd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...Qxb3!
- threat
- 1.Qd7+?
- 1...Sd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Sxd7
- 2.Rd5#
- 1...Bxd7!
- 1...Sd5
- 1.Se1?
- Keys
- 1.Sc1!
- threat
- 2.Rd3#
- 1...Qxb3
- 2.Sxb3#
- 1...Rf3
- 2.Re4#
- 1...Rf5
- 2.Se6#
- 1...Bf5
- 2.Bxf6#
- 1...Sb2
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- threat
- 1.Sc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 12
- Sets
- R(g);N_GUARD,XP(C)::R1(F)
- R(g);N_GUARD::R1(F)
- R(g);N_GUARD::R1(F),XR(g)
- R(g);S_CUTB(c)::S(L)
- B(c);N_GUARD::S(L)
- B(c);S_CUTR(g)::B(M),XP(k)
- B(c);N_GUARD::S(L),XB(c)
- S(d);N_GUARD::QAB1(K)
- S(d);N_GUARD::QAB1(K),XS(d)
- S(j);OGATE,XP(G)::QAR1(K),XS(j)
- S(j);N_GUARD::R1(H),XS(j)
- S(j);N_GUARD::R1(H)
- S(j);N_GUARD,XQ(K)::R1(H)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(b);::R1(F)
- B(c);S_CUTR(g)::B(M),XP(k)
- Refutation
- Q(b);XP(D)
- Try
- S(E);
- Threat
- R1(F)
- Vars
- S(d);N_GUARD,XS(E)::QAB1(K)
- R(g);N_GUARD::R1(F)
- R(g);S_CUTB(c)::S(L)
- B(c);S_CUTR(g)::B(M),XP(k)
- S(d);N_GUARD::QAB1(K),XS(d)
- Refutation
- Q(b);XP(D)
- Try
- S(E);XP(e)
- Threat
- DUALS(2)
- Vars
- Q(b);XS(E)::R1(F)
- Q(b);::R1(F)
- B(c);S_CUTR(g)::B(M),XP(k)
- Refutation
- Q(b);XP(D)
- Try
- S(E);XR(g)
- Threat
- DUALS(3)
- Vars
- B(c);::B(M),XP(k)
- Refutation
- B(a);CHECK,XS(E)
- Try
- S(E);
- Threat
- R1(F)
- Vars
- Q(b);XP(D)::S(E),XQ(b)
- S(d);OGATE,XS(E)::QAB1(K),XS(d)
- R(g);N_GUARD::R1(F)
- B(c);S_CUTR(g)::B(M),XP(k)
- Refutation
- S(d);
- Try
- R(F);N_PINP(k)
- Threat
- P(B)
- Vars
- R(g);N_GUARD::R1(F)
- R(g);N_GUARD::R1(F),XR(g)
- R(g);S_CUTB(c)::S(L)
- S(j);N_GUARD::R1(F),XS(j)
- Refutation
- B(c);
- Try
- R(F);
- Threat
- P(B)
- Vars
- S(j);OGATE,XP(G)::QAR1(K),XS(j)
- R(g);N_GUARD::R1(F)
- R(g);N_GUARD::R1(F),XR(g)
- B(c);S_CUTR(g)::B(M),XP(k)
- S(j);N_GUARD::R1(H),XS(j)
- Refutation
- R(g);
- Try
- R(F);
- Threat
- P(B)
- Vars
- S(j);OGATE,XP(G)::QAR1(K),XS(j)
- R(g);N_GUARD::R1(F)
- R(g);N_GUARD::R1(F),XR(g)
- B(c);S_CUTR(g)::B(M),XP(k)
- S(j);N_GUARD::R1(H),XS(j)
- Refutation
- R(g);
- Try
- R(F);
- Threat
- P(B)
- Vars
- S(j);OGATE,XP(G)::QAR1(K),XS(j)
- R(g);N_GUARD::R1(F)
- R(g);N_GUARD::R1(F),XR(g)
- B(c);S_CUTR(g)::B(M),XP(k)
- S(j);N_GUARD::R1(H),XS(j)
- Refutation
- R(g);
- Try
- R(H);
- Threat
- DUALS(2)
- Vars
- R(g);XP(C)::S(L)
- R(g);XR(H)::S(L)
- B(c);XR(H)::B(M),XP(k)
- S(j);OGATE,XP(G)::QAR1(K),XS(j)
- S(j);N_GUARD,XQ(K)::R1(H)
- R(g);::S(L)
- R(i);::S(L)
- S(j);N_GUARD::R1(H),XS(j)
- S(j);N_GUARD::R1(H)
- Refutation
- R(g);
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- R(g);XQ(K)::S(L)
- B(c);XQ(K)::B(M),XP(k)
- S(j);N_GUARD,XP(G)::QAR1(K)
- R(g);::S(L)
- R(i);::S(L)
- S(j);N_GUARD::QAR1(K),XS(j)
- S(j);N_GUARD::QAR1(K)
- Refutation
- Q(b);XP(D)
- Try
- Q(K);CHECK
- Vars
- S(j);N_GUARD,XQ(K)::R1(H)
- Refutation
- B(c);XQ(K)
- Try
- Actual
- S(E);
- Threat
- R1(F)
- Vars
- Q(b);XP(D)::S(E),XQ(b)
- R(g);N_GUARD::R1(F)
- R(g);S_CUTB(c)::S(L)
- B(c);S_CUTR(g)::B(M),XP(k)
- S(d);N_GUARD::QAB1(K)
- S(d);N_GUARD::QAB1(K),XS(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).