MESON Chess Problem Database
Problem Display
PID: 133959 (BB6/Q7/3N1K2/2qp4/2Nk1p2/1pp5/2PpP1b1/3R4 w - - 0 1)
Morra, Juan Carlos
The Field, 1963
(First published on Thu Apr 11 1963)
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qb6
- 2.Qxb6#
- 1...Qxa7
- 2.Bxa7#
- 1...f3
- 2.e3#
- 1...dxc4
- 2.Sf5#
- 1...Qb6
- Tries
- 1.Ke6?
- threat
- 2.Qg7#
- 1...Qxa7
- 2.Bxa7#
- 1...dxc4
- 2.Sf5#
- 1...Qb6
- 2.Qxb6#
- 1...Bh3+!
- threat
- 1.Kg6?
- threat
- 2.Qg7#
- 1...Qxa7
- 2.Bxa7#
- 1...dxc4
- 2.Sf5#
- 1...Qb6
- 2.Qxb6#
- 1...Be4+!
- threat
- 1.Sb5+?
- 1...Ke4
- 2.Qh7#
- 1...Kxc4!
- 1...Ke4
- 1.Ke6?
- Keys
- 1.Kg5!
- threat
- 2.Qg7#
- 1...dxc4+
- 2.Sf5#
- 1...Qxa7
- 2.Bxa7#
- 1...Qb6
- 2.Qxb6#
- threat
- 1.Kg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(g);OGATEB,P_PINS(E)::QAB(G),XQ(g)
- Q(g);N_SPINQ(g),OGATE,XQ(G)::B(I),XQ(g)
- P(f);N_GUARD::P(C)
- P(h);SBLOCK,XS(D)::S(E)
- Tries
- Try
- K(F);P-FLIGHT
- Threat
- QAB(G)
- Vars
- Q(g);N_SPINQ(g),OGATE,XQ(G)::B(I),XQ(g)
- P(h);SBLOCK,XS(D)::S(E)
- Q(g);OGATEB,P_PINS(E)::QAB(G),XQ(g)
- Refutation
- B(b);CHECK
- Try
- K(F);P-FLIGHT
- Threat
- QAB(G)
- Vars
- Q(g);N_SPINQ(g),OGATE,XQ(G)::B(I),XQ(g)
- P(h);SBLOCK,XS(D)::S(E)
- Q(g);OGATEB,P_PINS(E)::QAB(G),XQ(g)
- Refutation
- B(b);CHECK
- Try
- S(E);CHECK
- Vars
- K(e);N_SPINP(a),N_SPINQ(g),P-FLIGHT,P_SPINP(h)::QAB(G)
- Refutation
- K(e);N_SPINP(a),N_SPINQ(g),P-FLIGHT,XS(D)
- Try
- Actual
- K(F);S_FLIGHT
- Threat
- QAB(G)
- Vars
- P(h);CHECK,SBLOCK,XS(D)::S(E)
- Q(g);N_SPINQ(g),OGATE,XQ(G)::B(I),XQ(g)
- Q(g);OGATEB::QAB(G),XQ(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).