MESON Chess Problem Database
Problem Display
PID: 80440 (8/2N1R1P1/PpkN2KR/p3P1pp/1P1pnQ2/5q1r/6B1/7b w - - 0 1)
Ellerman, Arnoldo
Good Companions (May), 1923
#2
11 + 10
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Qxe4#
- 1...Qf1
- 2.Qxe4#
- 1...Qf2
- 2.Qxe4#
- 1...Qa3
- 2.Qxe4#
- 1...Qc3
- 2.Qxe4#
- 1...Qg3
- 2.Qxe4#
- 1...Sf2
- 2.Qc1#
- 1...Sg3
- 2.Qc1#
- 1...Sc5
- 2.b5#
- 1...Sf6
- 2.Qc1#
- 1...Qd1
- Tries
- 1.Kh7?
- threat
- 2.Sxe4#
- 1...Qxf4
- 2.Sf5#
- 1...Sxd6
- 2.Rxd6#
- 2.Qc1#
- 1...Qg4
- 2.Sf5#
- 1...Qb3
- 2.Sc4#
- 1...Sd2
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 1...Sf2
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Qc1#
- 1...Sc3
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 1...Sg3
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Qc1#
- 1...Sc5
- 2.b5#
- 1...Sf6+!
- threat
- 1.Sxe4?
- threat
- 2.Kf5#
- 2.Kxg5#
- 2.Kf7#
- 2.Kh7#
- 2.b5#
- 1...Qxe4+
- 2.Kxg5#
- 2.Kf7#
- 2.Qxe4#
- 1...Qxg2
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.Qf6#
- 2.b5#
- 1...Qxf4
- 2.b5#
- 1...axb4
- 2.Kf5#
- 2.Kxg5#
- 2.Kf7#
- 2.Kh7#
- 1...gxf4
- 2.Kf5#
- 2.Kg5#
- 2.Kf7#
- 2.Kh7#
- 2.b5#
- 1...b5
- 2.Kf5#
- 2.Kxg5#
- 2.Kf7#
- 2.Kh7#
- 1...Qe2
- 2.Kf5#
- 2.Kxg5#
- 2.Kf7#
- 2.Kh7#
- 2.Qf6#
- 1...Qg4
- 2.b5#
- 1...Qf1
- 2.Kf5#
- 2.Kxg5#
- 2.Kf7#
- 2.Kh7#
- 1...Qd3
- 2.Kf5#
- 2.Kxg5#
- 2.Kf7#
- 2.Kh7#
- 2.Qf6#
- 1...Qg3
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.Qf6#
- 2.b5#
- 1...Rg3
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.b5#
- 1...g4
- 2.Kf5#
- 2.Kg5#
- 2.Kf7#
- 2.Kh7#
- 2.b5#
- 1...Qb3!
- threat
- 1.Sdb5?
- threat
- 2.Sxd4#
- 2.Sa7#
- 1...Qd1
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.Sa7#
- 2.Qxe4#
- 2.Qf6#
- 1...Qf2
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.Sa7#
- 2.Qxe4#
- 1...Qc3
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.Sa7#
- 2.Qxe4#
- 2.Qf6#
- 1...Qd3
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.Sa7#
- 2.Qf6#
- 1...Qe3
- 2.Kf5#
- 2.Kf7#
- 2.Kh7#
- 2.Sa7#
- 2.Qf6#
- 1...d3
- 2.Sd4#
- 2.Sa7#
- 1...axb4!
- threat
- 1.Kh7?
- Keys
- 1.Kf7!
- threat
- 2.Sxe4#
- 1...Qb3+
- 2.Sc4#
- 1...Qxf4+
- 2.Sf5#
- 1...Sxd6+
- 2.Rxd6#
- 1...Qg4
- 2.Sf5#
- 1...Sd2
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 1...Sf2
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 1...Sc3
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 1...Sg3
- 2.Sc4#
- 2.Se4#
- 2.Sdb5#
- 2.Sf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 1...Sc5
- 2.b5#
- 1...Sf6
- 2.Qc1#
- threat
- 1.Kf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD,P_SPINS(e)::QAB(C),XS(e)
- S(e);N_GUARD,P_SPINQ(b)::QAR(C)
- S(e);P_SPINQ(b),SBLOCK::P(B)
- Tries
- Try
- K(G);S_FLIGHT
- Threat
- R(H)+S(F),XS(e)
- Vars
- Q(b);P_SPINS(e),XQ(C)::R(H)+S(F)
- Q(b);P_SPINS(e)::R(H)+S(F)
- S(e);P_SPINQ(b),SBLOCK::P(B)
- Refutation
- S(e);CHECK,P_SPINQ(b)
- Try
- S(F);XS(e)
- Threat
- DUALS(5)
- Vars
- Q(b);XQ(C)::P(B)
- Q(b);::P(B)
- Refutation
- Q(b);
- Try
- S(F);
- Threat
- DUALS(2)
- Refutation
- P(f);XP(B)
- Try
- Actual
- K(G);P_SPINQ(C),S_FLIGHT
- Threat
- R(H)+S(F),XS(e)
- Vars
- Q(b);CHECK,N_PINQ(C),P_SPINS(e)::R(H)+S(F)
- Q(b);CHECK,P_SPINS(e),XQ(C)::R(H)+S(F)
- S(e);CHECK,OGATE,P_SPINQ(b),P_SPINS(e),XS(F)::R1(H),XS(e)
- Q(b);N_PINQ(C),P_SPINS(e)::R(H)+S(F)
- S(e);P_SPINQ(b),SBLOCK::P(B)
- S(e);N_PINQ(C),P_SPINQ(b)::QAR(C)
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).