MESON Chess Problem Database
Problem Display
PID: 81554 (B5n1/2P5/3B2Rp/1P2Nk1P/b2pNP1R/2q3PK/5pQ1/8 w - - 0 1)
Hirschenson, Aaron
2nd Prize, Pat a Mat, 2001
#2
13 + 7
| 23 | Die Schwalbe | 2008 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.c8Q#
- 2.c8B#
- 1...Qe1
- 2.c8Q#
- 2.c8B#
- 1...Qb2
- 2.c8Q#
- 2.c8B#
- 1...Qd2
- 2.c8Q#
- 2.c8B#
- 1...Qb4
- 2.c8Q#
- 2.c8B#
- 1...Qa5
- 2.c8Q#
- 2.c8B#
- 1...Qa3
- 2.c8Q#
- 2.c8B#
- 1...Qd3
- 2.c8Q#
- 2.c8B#
- 1...Qe3
- 2.c8Q#
- 2.c8B#
- 1...Qf3
- 2.c8Q#
- 2.c8B#
- 1...Qxg3+
- 2.Sxg3#
- 1...Sf6
- 2.Rxf6#
- 1...Se7
- 2.Rf6#
- 1...Qa1
- Tries
- 1.Sxc3?
- threat
- 2.Be4#
- 2.Qe4#
- 2.c8Q#
- 2.c8B#
- 1...Bxb5
- 2.Be4#
- 2.Qe4#
- 1...dxc3
- 2.Be4#
- 2.Qe4#
- 2.c8Q#
- 2.c8B#
- 1...f1Q
- 2.Be4#
- 2.c8Q#
- 2.c8B#
- 1...f1S
- 2.Be4#
- 2.Qe4#
- 2.c8Q#
- 2.c8B#
- 1...f1B
- 2.Be4#
- 2.c8Q#
- 2.c8B#
- 1...f1R
- 2.Be4#
- 2.Qe4#
- 2.c8Q#
- 2.c8B#
- 1...Bd1
- 2.Be4#
- 2.Qe4#
- 2.c8Q#
- 2.c8B#
- 1...Bb3
- 2.Be4#
- 2.Qe4#
- 1...Se7
- 2.Be4#
- 2.Qe4#
- 1...d3
- 2.Be4#
- 2.Qe4#
- 2.c8Q#
- 2.c8B#
- 1...Sf6!
- threat
- 1.Sd3?
- threat
- 2.g4#
- 1...Qxd3
- 2.c8Q#
- 2.c8B#
- 1...Sf6
- 2.Rxf6#
- 1...Bd1!
- threat
- 1.Sc4?
- threat
- 2.c8Q#
- 2.c8B#
- 1...Qxg3+
- 2.Sxg3#
- 1...Qxc4
- 2.g4#
- 1...Sf6
- 2.Rxf6#
- 1...f1Q
- 2.c8Q#
- 2.c8B#
- 1...f1S
- 2.c8Q#
- 2.c8B#
- 1...f1B
- 2.c8Q#
- 2.c8B#
- 1...f1R
- 2.c8Q#
- 2.c8B#
- 1...Qa1
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qe1
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qb2
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qd2
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qb4
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qa5
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qc1
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qc2
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qa3
- 2.c8Q#
- 2.c8B#
- 1...Qb3
- 2.c8Q#
- 2.c8B#
- 1...Qd3
- 2.c8Q#
- 2.c8B#
- 1...Qe3
- 2.c8Q#
- 2.c8B#
- 1...Qf3
- 2.c8Q#
- 2.c8B#
- 1...Bd1
- 2.c8Q#
- 2.c8B#
- 1...Bc2
- 2.c8Q#
- 2.c8B#
- 1...Bb3
- 2.c8Q#
- 2.c8B#
- 1...Se7
- 2.Rf6#
- 1...d3
- 2.Se3#
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Bxb5!
- threat
- 1.Sc6?
- threat
- 2.c8Q#
- 2.c8B#
- 1...Qxg3+
- 2.Sxg3#
- 1...Qxc6
- 2.g4#
- 1...Bxb5
- 2.c8Q#
- 2.c8B#
- 1...Qf3
- 2.Sxd4#
- 1...Sf6
- 2.Rxf6#
- 1...f1Q
- 2.c8Q#
- 2.c8B#
- 1...f1S
- 2.c8Q#
- 2.c8B#
- 1...f1B
- 2.c8Q#
- 2.c8B#
- 1...f1R
- 2.c8Q#
- 2.c8B#
- 1...Qa1
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qe1
- 2.Sxd4#
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qb2
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qd2
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qb4
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qa5
- 2.Sxd4#
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qc1
- 2.Sxd4#
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qc2
- 2.Sxd4#
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Qa3
- 2.Sxd4#
- 2.c8Q#
- 2.c8B#
- 1...Qb3
- 2.Sxd4#
- 1...Qd3
- 2.c8Q#
- 2.c8B#
- 1...Qe3
- 2.c8Q#
- 2.c8B#
- 1...Qc4
- 2.g4#
- 1...Qc5
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Bd1
- 2.c8Q#
- 2.c8B#
- 1...Bc2
- 2.c8Q#
- 2.c8B#
- 1...Se7
- 2.Sxe7#
- 2.Rf6#
- 1...d3
- 2.g4#
- 2.c8Q#
- 2.c8B#
- 1...Bb3!
- threat
- 1.Bc5?
- threat
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qxg3+
- 2.Sxg3#
- 1...Bxb5
- 2.Sd6#
- 1...Sf6
- 2.Rxf6#
- 1...f1Q
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...f1S
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...f1B
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...f1R
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qa1
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qe1
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qb2
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qd2
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qb4
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qa5
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qc1
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qc2
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qa3
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qb3
- 2.Sd6#
- 1...Qd3
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qe3
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qf3
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qc4
- 2.Sd6#
- 1...Bd1
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Bc2
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Bb3
- 2.Sd6#
- 1...Se7
- 2.Sd6#
- 2.Rf6#
- 1...d3
- 2.Sd6#
- 2.c8Q#
- 2.c8B#
- 1...Qxc5!
- threat
- 1.Rg5+?
- 1...Ke6
- 2.f5#
- 1...hxg5!
- 1...Ke6
- 1.Sxc3?
- Keys
- 1.Sf3!
- threat
- 2.g4#
- 1...Qxf3
- 2.c8Q#
- 2.c8B#
- 1...Qc6
- 2.Sxd4#
- 1...Sf6
- 2.Rxf6#
- threat
- 1.Sf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- Q(b);N_GUARD,N_PINP(B)::P=Q
- Q(b);N_GUARD::P=Q
- Q(b);CHECK,XP(B)::S(D),XQ(b)
- S(g);N_GUARD::R1(K),XS(g)
- S(g);N_GUARD::R1(K)
- Tries
- Try
- S(D);N_SPINP(B),XQ(b)
- Threat
- DUALS(4)
- Refutation
- S(g);
- Try
- S(H);N_SPINP(B)
- Threat
- P(B)
- Vars
- Q(b);N_GUARD,P_PINP(B),XS(H)::P=Q
- S(g);N_GUARD::R1(K),XS(g)
- Refutation
- B(c);
- Try
- S(H);
- Threat
- P=Q
- Vars
- Q(b);CHECK,XP(B)::S(D),XQ(b)
- Q(b);N_PINP(B),XS(H)::P(B)
- S(g);N_GUARD::R1(K),XS(g)
- P(a);P_PINQ(A)::P=Q
- P(a);::P=Q
- Q(b);::P=Q
- B(c);::P=Q
- S(g);N_GUARD::R1(K)
- Refutation
- B(c);XP(G)
- Try
- S(H);
- Threat
- P=Q
- Vars
- Q(b);CHECK,XP(B)::S(D),XQ(b)
- Q(b);N_PINP(B),XS(H)::P(B)
- B(c);XP(G)::P=Q
- Q(b);N_GUARD::S(H),XP(d)
- S(g);N_GUARD::R1(K),XS(g)
- P(a);P_PINQ(A)::P=Q
- P(a);::P=Q
- Q(b);::P=Q
- Q(b);N_PINP(B)::P(B)
- B(c);::P=Q
- Refutation
- B(c);
- Try
- B(J);
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,XP(B)::S(D),XQ(b)
- B(c);XP(G)::S(D)
- S(g);N_GUARD::R1(K),XS(g)
- Q(b);::S(D)
- Q(b);N_PINP(B)::S(D)
- B(c);::S(D)
- Refutation
- Q(b);N_PINP(B),XB(J)
- Try
- R(K);CHECK
- Vars
- K(e);OGATE,S_FLIGHT::P(E)
- Refutation
- P(f);XR(K)
- Try
- Actual
- S(H);N_SPINP(B)
- Threat
- P(B)
- Vars
- Q(b);N_GUARD,P_PINP(B),XS(H)::P=Q
- Q(b);N_GUARD::S(H),XP(d)
- S(g);N_GUARD::R1(K),XS(g)
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).