MESON Chess Problem Database
Problem Display
PID: 51509 (R7/3kPp2/B2B1n2/qP2PK2/N7/2p5/5b2/3Q4 w - - 0 1)
Morra, Juan Carlos
The Guardian, 1962
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Rd8#
- 1...Qd8
- 2.Rxd8#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxa4
- 2.Rd8#
- 1...Qxb5
- 2.Bxb5#
- 1...Qxa6
- 2.Rd8#
- 1...Be1
- 2.Sc5#
- 1...Bg3
- 2.Sc5#
- 1...Bh4
- 2.Sc5#
- 1...Bc5
- 2.Sxc5#
- 1...Se4
- 2.e8Q#
- 2.e8B#
- 1...Sg4
- 2.e8Q#
- 2.e8B#
- 1...Sd5
- 2.e8Q#
- 2.e8B#
- 1...Sh5
- 2.e8Q#
- 2.e8B#
- 1...Sh7
- 2.e8Q#
- 2.e8B#
- 1...Se8
- 2.Bc8#
- 1...Sg8
- 2.e8Q#
- 2.e8B#
- 1...Qb4
- Tries
- 1.Kxf6?
- threat
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Qxa4
- 2.Rd8#
- 2.e8Q#
- 2.e8B#
- 1...Qxb5
- 2.Bxb5#
- 2.e8Q#
- 2.e8B#
- 1...Qxa6
- 2.Rd8#
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Qd8
- 2.Rxd8#
- 2.exd8Q#
- 2.exd8R#
- 1...Qb4
- 2.Rd8#
- 2.e8Q#
- 2.e8B#
- 1...Qb6
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Qc7
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Be1
- 2.Sc5#
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Bg1
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Be3
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Bg3
- 2.Sc5#
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Bd4
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Bc5
- 2.Sxc5#
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Bb6
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Ba7
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...c2
- 2.Qg4#
- 2.e8Q#
- 2.e8B#
- 1...Bh4+!
- threat
- 1.exf6?
- threat
- 2.e8Q#
- 2.e8B#
- 1...Qxb5+
- 2.Bxb5#
- 1...Qxa4
- 2.Rd8#
- 2.e8Q#
- 2.e8B#
- 1...Qxa6
- 2.Rd8#
- 2.e8Q#
- 2.e8B#
- 1...Qd8
- 2.Rxd8#
- 2.exd8Q#
- 2.exd8R#
- 1...Qb4
- 2.Rd8#
- 2.e8Q#
- 2.e8B#
- 1...Qb6
- 2.e8Q#
- 2.e8B#
- 1...Qc7
- 2.e8Q#
- 2.e8B#
- 1...Be1
- 2.Sc5#
- 2.e8Q#
- 2.e8B#
- 1...Bg1
- 2.e8Q#
- 2.e8B#
- 1...Be3
- 2.e8Q#
- 2.e8B#
- 1...Bg3
- 2.Sc5#
- 2.Bxg3#
- 2.Bf4#
- 2.Be5#
- 2.e8Q#
- 2.e8B#
- 1...Bh4
- 2.Sc5#
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Be5#
- 2.e8Q#
- 2.e8B#
- 1...Bc5
- 2.Sxc5#
- 2.e8Q#
- 2.e8B#
- 1...Bb6
- 2.e8Q#
- 2.e8B#
- 1...Ba7
- 2.e8Q#
- 2.e8B#
- 1...c2
- 2.e8Q#
- 2.e8B#
- 1...Bd4!
- threat
- 1.Kxf6?
- Keys
- 1.Qg4!
- threat
- 2.Kxf6#
- 1...Qxa4
- 2.Rd8#
- 1...Qxb5
- 2.Bxb5#
- 1...Sxg4
- 2.e8Q#
- 2.e8B#
- 1...Qd8
- 2.Rxd8#
- 2.exd8Q#
- 2.exd8R#
- 1...Qb4
- 2.Rd8#
- 1...Bh4
- 2.Sc5#
- 1...Se4
- 2.e8Q#
- 2.e8B#
- 1...Sd5
- 2.e8Q#
- 2.e8B#
- 1...Sh5
- 2.e8Q#
- 2.e8B#
- 1...Sh7
- 2.e8Q#
- 2.e8B#
- 1...Se8
- 2.Bc8#
- 1...Sg8
- 2.e8Q#
- 2.e8B#
- threat
- 1.Qg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- Q(c);N_GUARD::R1(I)
- Q(c);N_GUARD,XS(B)::R1(I)
- Q(c);OGATE,P_PINP(D),XP(C)::B(F),XQ(c)
- Q(c);N_GUARD,XB(F)::R1(I)
- B(a);N_GUARD::S(B)
- B(a);N_GUARD::S(B),XB(a)
- S(d);N_GUARD::P=Q
- S(d);SBLOCK::B(F)
- Tries
- Try
- K(E);P-FLIGHT,XS(d)
- Threat
- DUALS(3)
- Refutation
- B(a);CHECK
- Try
- P(D);P_SPINP(C),XS(d)
- Threat
- P=Q
- Vars
- Q(c);CHECK,OGATE,XP(C)::B(F),XQ(c)
- Q(c);N_PINP(C)::P=Q
- B(a);::P=Q
- P(b);::P=Q
- Refutation
- B(a);
- Try
- Actual
- Q(A);
- Threat
- QAB(A)+K(E),XS(d)
- Vars
- Q(c);N_GUARD,XS(B)::R1(I)
- Q(c);OGATE,P_PINP(D),XP(C)::B(F),XQ(c)
- S(d);N_GUARD,XQ(A)::P=Q
- Q(c);N_GUARD::R1(I)
- B(a);N_GUARD::S(B)
- S(d);N_GUARD::P=Q
- S(d);SBLOCK::B(F)
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).