MESON Chess Problem Database
Problem Display
PID: 139337 (Q3R3/4q3/8/1n4p1/2p1N2B/b7/3R2P1/5k1K w - - 0 1)
Ellerman, Arnoldo
El Ajedrez Americano, 1934
#2
7 + 6
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Sg3#
- 1...Qc5
- 2.Sg3#
- 1...Qf6
- 2.Sg3#
- 1...Qd8
- 2.Sg3#
- 1...Qf8
- 2.Sg3#
- 1...Qa7
- 2.Sg3#
- 1...Qb7
- 2.Sg3#
- 1...Qd7
- 2.Sg3#
- 1...Qf7
- 2.Sg3#
- 1...Qg7
- 2.Sg3#
- 1...Qh7
- 2.Sg3#
- 1...Bb4
- 2.Qa1#
- 1...Bc5
- 2.Qa1#
- 1...Bd6
- 2.Qa1#
- 1...Qb4
- Tries
- 1.Rxe7?
- threat
- 2.Sg3#
- 2.Rf7#
- 2.Qf8#
- 1...Bxe7
- 2.Qa1#
- 1...Bb2
- 2.Sg3#
- 1...Bc5
- 2.Sg3#
- 2.Qa1#
- 1...Bd6
- 2.Qa1#
- 1...Sd4
- 2.Sg3#
- 1...Sd6
- 2.Sg3#
- 1...gxh4!
- threat
- 1.Rf8+?
- 1...Qf6
- 2.Rxf6#
- 1...Qf7
- 2.Rxf7#
- 1...Qxf8!
- 1...Qf6
- 1.Rxe7?
- Keys
- 1.Qa5!
- threat
- 2.Rf2#
- 1...Qb4
- 2.Sg3#
- 1...Qc5
- 2.Sg3#
- 1...Qf6
- 2.Sg3#
- 1...Qf8
- 2.Sg3#
- 1...Qa7
- 2.Sg3#
- 1...Qf7
- 2.Sg3#
- 1...Bb4
- 2.Qa1#
- 1...Bc5
- 2.Qa1#
- 1...Sc3
- 2.Qf5#
- 1...c3
- 2.Qxb5#
- threat
- 1.Qa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(f);::S(D)
- Q(f);P_PINB(E)::S(D)
- B(b);OGATE::QAR(F)
- Tries
- Try
- R(G);XQ(f)
- Threat
- DUALS(3)
- Vars
- B(b);OGATE,XR(G)::QAR(F)
- B(b);::S(D)
- B(b);OGATE::QAR(F)
- S(d);::S(D)
- Refutation
- P(e);XB(E)
- Try
- R(G);CHECK
- Vars
- Q(f);N_GUARD,P_SPINQ(f)::R(G),XQ(f)
- Refutation
- Q(f);XR(G)
- Try
- Actual
- Q(F);
- Threat
- R1(B)
- Vars
- Q(f);::S(D)
- B(b);OGATE::QAR(F)
- S(d);OGATE::QAR(F)
- P(c);OGATEB::QAB(F),XS(d)
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).