MESON Chess Problem Database
Problem Display
PID: 12382 (4R3/3N1pNQ/3p4/p2p3p/P1pk1Bnp/3p2nP/B2P2K1/4R3 w - - 0 1)
Zappas, Byron
1st Prize, Castellari MT (Sinfonie Scacchistiche), 1978-1980
#2
11 + 11
| 3750 | FIDE Album (1977-1979) | 1984 |
| 4901 | Best Problems | 2008 |
| 133 | The Problemist Supplement | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3+
- 2.Bxe3#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Sf1
- Tries
- 1.Bxg3?
- threat
- 2.Sf5#
- 1...Sh6
- 2.Bf2#
- 1...f5
- 2.Sxf5#
- 2.Se6#
- 1...Se3+!
- threat
- 1.Bg5?
- 1...Se3+
- 2.Bxe3#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 2.Bf6#
- 1...Sh2
- 2.Be3#
- 2.Bf6#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 2.Bxf6#
- 1...Sh6
- 2.Be3#
- 2.Bf6#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...c3!
- 1...Se3+
- 1.Bxd6?
- threat
- 2.Bc5#
- 1...Se4
- 2.Sf5#
- 1...Se3+!
- threat
- 1.Rc1?
- 1...Se3+
- 2.Bxe3#
- 2.dxe3#
- 1...c3
- 2.dxc3#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f6
- 2.Se6#
- 1...f5!
- 1...Se3+
- 1.R1e4+?
- 1...Sxe4
- 2.Sf5#
- 1...dxe4!
- 1...Sxe4
- 1.R1e5?
- 1...Se3+
- 2.Bxe3#
- 1...Sxe5
- 2.Be3#
- 1...c3
- 2.Rxd5#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...dxe5!
- 1...Se3+
- 1.R8e4+?
- 1...Sxe4
- 2.Sf5#
- 1...dxe4!
- 1...Sxe4
- 1.R8e5?
- 1...Se3+
- 2.Bxe3#
- 1...Sxe5
- 2.Be3#
- 1...c3
- 2.Rxd5#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...dxe5!
- 1...Se3+
- 1.R8e7?
- 1...Se3+
- 2.Bxe3#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...c3!
- 1...Se3+
- 1.Rc8?
- 1...Se3+
- 2.Bxe3#
- 1...c3
- 2.dxc3#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Se2!
- 1...Se3+
- 1.Qe4+?
- 1...Sxe4
- 2.Sf5#
- 1...dxe4!
- 1...Sxe4
- 1.Qg6?
- 1...Se3+
- 2.Bxe3#
- 1...fxg6
- 2.Se6#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 2.Qf6#
- 1...Sh2
- 2.Be3#
- 2.Qf6#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 2.Qxf6#
- 1...Sh6
- 2.Be3#
- 2.Qf6#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...c3!
- 1...Se3+
- 1.Qxh5?
- 1...Se3+
- 2.Bxe3#
- 1...Sxh5
- 2.Sf5#
- 1...c3
- 2.Qxd5#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Se5!
- 1...Se3+
- 1.Qh8?
- threat
- 2.Sf5#
- 2.Se6#
- 1...Se3+
- 2.Bxe3#
- 1...Se2
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 2.Se6#
- 1...Sf6
- 2.Be3#
- 1...f5
- 2.Sxf5#
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Se5!
- threat
- 1.hxg4?
- threat
- 2.Be3#
- 1...Sf1
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...h3+!
- threat
- 1.Bxg3?
- Keys
- 1.Bb1!
- 1...Se3+
- 2.Bxe3#
- 1...c3
- 2.Qxd3#
- 1...Sf1
- 2.Sf5#
- 1...Sh1
- 2.Sf5#
- 1...Se2
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Se3+
- 1.Bb1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- S(e);CHECK,N_GUARD::B(G),XS(e)
- P(k);N_GUARD::S(I)
- Tries
- Try
- B(G);XS(b)
- Threat
- S(I)
- Vars
- S(e);N_GUARD::B(G)
- Refutation
- S(e);CHECK
- Try
- B(G);
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- P(c);
- Try
- B(G);XP(j)
- Threat
- B(G)
- Vars
- S(b);N_GUARD::S(I)
- Refutation
- S(e);CHECK
- Try
- R(A);
- Vars
- P(c);OGATE::P(C),XP(c)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- P(k);
- Try
- R(A);CHECK
- Vars
- S(b);XR(A)::S(I)
- Refutation
- P(h);XR(A)
- Try
- R(A);
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- S(e);N_GUARD,XR(A)::B(G)
- P(c);::R1(A),XP(h)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- P(j);XR(A)
- Try
- R(K);CHECK
- Vars
- S(b);XR(K)::S(I)
- Refutation
- P(h);XR(K)
- Try
- R(K);
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- S(e);N_GUARD,XR(K)::B(G)
- P(c);::R1(K),XP(h)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- P(j);XR(K)
- Try
- R(K);
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- P(c);
- Try
- R(K);
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- P(c);OGATE::P(C),XP(c)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- S(b);
- Try
- Q(J);CHECK
- Vars
- S(b);XQ(J)::S(I)
- Refutation
- P(h);XQ(J)
- Try
- Q(J);
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- P(k);N_GUARD,XQ(J)::S(I)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- P(c);
- Try
- Q(J);XP(i)
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- S(b);N_GUARD,XQ(J)::S(I)
- P(c);::QAR1(J),XP(h)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
- Refutation
- S(e);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- S(b);::QAB(J)+S(I),DCHECK
- S(e);N_GUARD::B(G)
- P(k);::S(I)
- Refutation
- S(e);
- Try
- P(E);XS(e)
- Threat
- B(G)
- Vars
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- Refutation
- P(f);CHECK
- Try
- Actual
- B(B);
- Vars
- S(e);CHECK,N_GUARD::B(G),XS(e)
- P(c);N_GUARD::QAR1(J),XP(a)
- S(b);N_GUARD::S(I)
- S(b);N_GUARD::S(I),XS(b)
- S(e);N_GUARD::B(G)
- P(k);N_GUARD::S(I)
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).