MESON Chess Problem Database
Problem Display
PID: 105410 (6N1/5PR1/8/RB2Br1k/8/5P2/6N1/1K6 w - - 0 1)
Zappas, Byron
Sinfonie Scacchistiche, 1977
#2
9 + 2
| 6490 | yacpdb | 2009 |
| 3713 | Snap | 2022 |
SOLUTION
- SOUND
- Tries
- 1.Sf4+?
- 1...Kh4
- 2.Rg4#
- 1...Rxf4!
- 1...Kh4
- 1.Bf1?
- 1...Rxf3
- 2.Bf4#
- 1...Rxe5
- 2.Rxe5#
- 1...Rxf7
- 2.Bf6#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 1...Rg5!
- 1...Rxf3
- 1.Be2?
- threat
- 2.f4#
- 1...Rxf3
- 2.Bxf3#
- 2.Ba1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bb8#
- 1...Rf4
- 2.Bxf4#
- 1...Rg5!
- threat
- 1.Ba4?
- 1...Rxf3
- 2.Bf4#
- 1...Rxe5
- 2.Rxe5#
- 1...Rxf7
- 2.Bf6#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 1...Rg5!
- 1...Rxf3
- 1.Bc4?
- 1...Rxf3
- 2.Bf4#
- 1...Rxe5
- 2.Rxe5#
- 1...Rxf7
- 2.Bxf7#
- 2.Bf6#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 1...Rg5!
- 1...Rxf3
- 1.Ba6?
- 1...Rxf3
- 2.Bf4#
- 1...Rxe5
- 2.Rxe5#
- 1...Rxf7
- 2.Bf6#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 1...Rg5!
- 1...Rxf3
- 1.Bc6?
- 1...Rxf3
- 2.Bf4#
- 2.Bxf3#
- 1...Rxe5
- 2.Rxe5#
- 1...Rxf7
- 2.Bf6#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 1...Rg5!
- 1...Rxf3
- 1.Bd7?
- 1...Rxf3
- 2.Bf4#
- 2.Bg4#
- 1...Rxe5
- 2.Bg4#
- 2.Rxe5#
- 1...Rxf7
- 2.Bf6#
- 2.Bg4#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 2.Bg4#
- 1...Rg5!
- 1...Rxf3
- 1.Be8?
- 1...Rxf3
- 2.Bf4#
- 1...Rxe5
- 2.Rxe5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Rxf7
- 2.Ba1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bb8#
- 2.Bxf7#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 1...Rg5!
- 1...Rxf3
- 1.Bg3?
- 1...Rxb5+
- 2.Rxb5#
- 1...Rxf3
- 2.Be2#
- 1...Rxf7
- 2.Be8#
- 1...Rg5
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Rc5
- 2.Sf4#
- 1...Rd5
- 2.Sf4#
- 1...Re5
- 2.Sf4#
- 1...Rf6!
- 1...Rxb5+
- 1.Bf4?
- 1...Rxb5+
- 2.Rxb5#
- 1...Rxf7
- 2.Be8#
- 2.Rg5#
- 1...Rg5
- 2.Rxg5#
- 1...Rc5
- 2.Sf6#
- 1...Rd5
- 2.Sf6#
- 1...Re5
- 2.Sf6#
- 1...Rf6
- 2.Sxf6#
- 2.Rg5#
- 1...Rxf4!
- 1...Rxb5+
- 1.Bf6?
- 1...Rxb5+
- 2.Rxb5#
- 1...Rxf3
- 2.Be2#
- 2.Rg5#
- 1...Rg5
- 2.Rxg5#
- 1...Rf4
- 2.Sxf4#
- 2.Rg5#
- 1...Rc5
- 2.Sf4#
- 1...Rd5
- 2.Sf4#
- 1...Re5
- 2.Sf4#
- 1...Rxf6!
- 1...Rxb5+
- 1.f4?
- threat
- 2.Be2#
- 1...Rg5
- 2.Rxg5#
- 1...Rxf4!
- threat
- 1.Sf4+?
- Keys
- 1.Bd3!
- 1...Rxf3
- 2.Bf4#
- 1...Rxe5
- 2.Rxe5#
- 1...Rxf7
- 2.Bf6#
- 1...Rg5
- 2.Rh7#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Bxf6#
- 1...Rxf3
- 1.Bd3!
Anticipated by 262467(1969)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- Tries
- Try
- S(B);CHECK
- Vars
- K(b);P-FLIGHT::R1(H)
- Refutation
- R(a);XS(B)
- Try
- B(E);
- Vars
- R(a);OGATEB,XP(C)::R(D)+B(F)
- R(a);OGATE,P_SPINR(a),XB(F)::R(D),XR(a)
- R(a);OGATEB,XP(G)::R(D)+B(F)
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(E);
- Threat
- B(E)+P(C)
- Vars
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(E);
- Vars
- R(a);OGATEB,XP(C)::R(D)+B(F)
- R(a);OGATE,P_SPINR(a),XB(F)::R(D),XR(a)
- R(a);OGATEB,XP(G)::R(D)+B(F)
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(E);
- Vars
- R(a);OGATEB,XP(C)::R(D)+B(F)
- R(a);OGATE,P_SPINR(a),XB(F)::R(D),XR(a)
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(E);
- Vars
- R(a);OGATEB,XP(C)::R(D)+B(F)
- R(a);OGATE,P_SPINR(a),XB(F)::R(D),XR(a)
- R(a);OGATEB,XP(G)::R(D)+B(F)
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(E);
- Vars
- R(a);OGATE,P_SPINR(a),XB(F)::R(D),XR(a)
- R(a);OGATEB,XP(G)::R(D)+B(F)
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(E);
- Vars
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(E);
- Vars
- R(a);OGATEB,XP(C)::R(D)+B(F)
- R(a);OGATEB::R(D)+B(F),XR(a)
- Refutation
- R(a);
- Try
- B(F);
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XB(E)::R(D),XR(a)
- R(a);OGATEB,XP(C)::R(D)+B(E)
- R(a);OGATEB,XP(G)::R(D)+B(E)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD::S(B),XR(a)
- Refutation
- R(a);
- Try
- B(F);
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XB(E)::R(D),XR(a)
- R(a);N_GUARD::R1(H),XR(a)
- R(a);N_GUARD::S(I)
- Refutation
- R(a);XB(F)
- Try
- B(F);
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XB(E)::R(D),XR(a)
- R(a);N_GUARD::R1(H),XR(a)
- R(a);N_GUARD::S(B)
- Refutation
- R(a);XB(F)
- Try
- P(C);
- Threat
- B(E)
- Vars
- R(a);N_GUARD::R1(H),XR(a)
- Refutation
- R(a);XP(C)
- Try
- Actual
- B(E);
- Vars
- R(a);OGATEB,XP(C)::R(D)+B(F)
- R(a);OGATE,P_SPINR(a),XB(F)::R(D),XR(a)
- R(a);OGATEB,XP(G)::R(D)+B(F)
- R(a);SBLOCK::R(H)
- R(a);OGATEB::R(D)+B(F),XR(a)
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).