MESON Chess Problem Database
Problem Display
PID: 83776 (Qq3b1r/8/6Bp/2P4p/3R1pkP/4P3/3N2NK/3bB3 w - - 0 1)
Ellerman, Arnoldo
Die Schwalbe, 1961
#2
10 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa7
- 2.Rxf4#
- 1...Qb1
- 2.Rxf4#
- 1...Qb2
- 2.Rxf4#
- 2.Qc8#
- 1...Qb3
- 2.Rxf4#
- 1...Qb4
- 2.Qc8#
- 1...Qb5
- 2.Rxf4#
- 1...Qb6
- 2.Rxf4#
- 1...Qb7
- 2.Rxf4#
- 1...Qxa8
- 2.Rxf4#
- 1...Qc8
- 2.Rxf4#
- 2.Qxc8#
- 1...Qd8
- 2.Rxf4#
- 1...Qe8
- 2.Rxf4#
- 1...Bc2
- 2.Qf3#
- 1...Bb3
- 2.Qf3#
- 1...Bf3
- 2.Qxf3#
- 1...Ba4
- 2.Qf3#
- 1...Qa7
- Tries
- 1.Qe4?
- threat
- 2.Bf5#
- 2.Qf5#
- 2.Qe6#
- 1...Qd6
- 2.Bf5#
- 2.Qf5#
- 1...Qb1
- 2.Bf5#
- 2.Qxf4#
- 1...Qb3
- 2.Bf5#
- 2.Qf5#
- 2.Qxf4#
- 1...Qb6
- 2.Bf5#
- 2.Qf5#
- 2.Qxf4#
- 1...Qc8
- 2.Qxf4#
- 1...Qe8
- 2.Bf5#
- 2.Qf5#
- 2.Qxf4#
- 1...Bc2
- 2.Bf5#
- 2.Qf3#
- 1...Bb3
- 2.Bf5#
- 2.Qf3#
- 2.Qf5#
- 1...Qe5!
- threat
- 1.Qd5?
- threat
- 2.Bf5#
- 2.Bxh5#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 2.Qd7#
- 1...Qd6
- 2.Bf5#
- 2.Bxh5#
- 2.Qf5#
- 2.Qxh5#
- 1...Qa7
- 2.Bf5#
- 2.Bxh5#
- 2.Rxf4#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Qc7
- 2.Bf5#
- 2.Bxh5#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Qb1
- 2.Bxh5#
- 2.Rxf4#
- 2.Qxh5#
- 1...Qb3
- 2.Bf5#
- 2.Bxh5#
- 2.Rxf4#
- 2.Qf5#
- 2.Qxh5#
- 1...Qb5
- 2.Bf5#
- 2.Bxh5#
- 2.Rxf4#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Qb6
- 2.Bf5#
- 2.Bxh5#
- 2.Rxf4#
- 2.Qf5#
- 2.Qxh5#
- 1...Qb7
- 2.Bf5#
- 2.Bxh5#
- 2.Rxf4#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Qc8
- 2.Bxh5#
- 2.Rxf4#
- 2.Qxh5#
- 1...Qd8
- 2.Bf5#
- 2.Bxh5#
- 2.Rxf4#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Qe8
- 2.Bf5#
- 2.Rxf4#
- 2.Qf5#
- 2.Qxh5#
- 1...Rh7
- 2.Bf5#
- 2.Bxh5#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Bc2
- 2.Bxh5#
- 2.Qf3#
- 2.Qxh5#
- 1...Bb3
- 2.Bf5#
- 2.Bxh5#
- 2.Qf3#
- 2.Qf5#
- 2.Qxh5#
- 1...Ba4
- 2.Bf5#
- 2.Bxh5#
- 2.Qf3#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Bd6
- 2.Bf5#
- 2.Bxh5#
- 2.Qe6#
- 2.Qf5#
- 2.Qxh5#
- 1...Qe5!
- threat
- 1.Qxb8?
- threat
- 2.Rxf4#
- 2.Qxf4#
- 2.Qc8#
- 1...Bxc5
- 2.Rxf4#
- 2.Qxf4#
- 1...Rh7
- 2.Rxf4#
- 2.Qxf4#
- 1...Bc2
- 2.Rxf4#
- 2.Qxf4#
- 1...Bb3
- 2.Rxf4#
- 2.Qxf4#
- 1...Ba4
- 2.Rxf4#
- 2.Qxf4#
- 1...Be7
- 2.Rxf4#
- 2.Qxf4#
- 1...Bg7
- 2.Rxf4#
- 2.Qxf4#
- 1...Bd6!
- threat
- 1.exf4?
- threat
- 2.Se3#
- 1...Qxf4+
- 2.Rxf4#
- 1...Qe5
- 2.fxe5#
- 1...Qb3
- 2.f5#
- 1...Qe8!
- threat
- 1.e4?
- threat
- 2.Bf5#
- 1...f3+
- 2.e5#
- 1...Qc8
- 2.Qxc8#
- 1...Qe5!
- threat
- 1.Qe4?
- Keys
- 1.Sxf4!
- threat
- 2.Qg2#
- 1...Qxf4+
- 2.Rxf4#
- 1...Qxa8
- 2.Sd5#
- 1...Qb7
- 2.Sd5#
- 1...Bf3
- 2.Qxf3#
- threat
- 1.Sxf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 11
- Sets
- Q(f);N_GUARD::R1(F),XP(b)
- Q(f);OGATE::QAB(J)
- Q(f);N_GUARD,XQ(J)::R1(F),XP(b)
- B(a);N_GUARD::QAB1(J)
- B(a);N_GUARD::QAB1(J),XB(a)
- Tries
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- Q(f);N_GUARD::QAR1(J),XP(b)
- Refutation
- Q(f);
- Try
- Q(J);
- Threat
- DUALS(6)
- Refutation
- Q(f);
- Try
- Q(J);XQ(f)
- Threat
- DUALS(3)
- Refutation
- B(g);
- Try
- P(E);P_SPINP(E),XP(b)
- Threat
- S(C)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XP(E)::R1(F),XQ(f)
- Q(f);::R(F)+P(E),XQ(f)
- Q(f);N_PINP(E)::R(F)+P(E)
- Refutation
- Q(f);N_PINP(E)
- Try
- P(E);N_PINP(b)
- Threat
- B(I)
- Vars
- P(b);CHECK::R(F)+P(E)
- Q(f);OGATE::QAB(J),XQ(f)
- Refutation
- Q(f);
- Try
- Actual
- S(C);P_SPINS(C),XP(b)
- Threat
- QAR2(J)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XS(C)::R1(F),XQ(f)
- Q(f);N_PINS(C),XQ(J)::R(F)+S(C)
- Q(f);N_PINS(C)::R(F)+S(C)
- B(a);N_GUARD::QAB1(J),XB(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).