MESON Chess Problem Database
Problem Display
PID: 178067 (4B3/4bNr1/2PPkn1R/2Q2b2/1r4pR/4p1P1/1qn1N2K/8 w - - 0 1)
Casa, Alex
Bulletin Ouvrier des Echecs, 1952
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Qe5#
- 1...Qa3
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...Qb1
- 2.Qe5#
- 1...Qa2
- 2.Qe5#
- 1...Qb3
- 2.Qe5#
- 1...Rb3
- 2.Sf4#
- 2.Qc4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Qe5#
- 1...Rf4
- 2.Sxf4#
- 1...Rb5
- 2.Sf4#
- 1...Rb6
- 2.Sf4#
- 2.Qc4#
- 1...Rb7
- 2.Sf4#
- 2.Qc4#
- 1...Rb8
- 2.Sf4#
- 2.Qc4#
- 1...Rg5
- 2.Sxg5#
- 1...Rxf7
- 2.Bd7#
- 1...Rh7
- 2.Sg5#
- 1...Be4
- 2.Sf4#
- 1...Bg6
- 2.Sg5#
- 1...Bxd6
- 2.Qxd6#
- 1...Bd8
- 2.Sxd8#
- 1...Bf8
- 2.Sd8#
- 1...Sd4
- 2.Qe5#
- 1...Qc1
- Tries
- 1.Rg6?
- threat
- 2.Sg5#
- 1...Rxf7
- 2.Bd7#
- 1...Bxd6
- 2.Qxd6#
- 1...Rxg6!
- threat
- 1.c7?
- threat
- 2.c8Q#
- 2.c8B#
- 1...Rxf7
- 2.c8Q#
- 2.c8B#
- 1...Bxd6
- 2.Qxd6#
- 1...Qa1
- 2.c8Q#
- 2.c8B#
- 1...Qc1
- 2.Qe5#
- 2.c8Q#
- 2.c8B#
- 1...Qa3
- 2.Qe5#
- 2.c8Q#
- 2.c8B#
- 1...Qc3
- 2.c8Q#
- 2.c8B#
- 1...Qd4
- 2.c8Q#
- 2.c8B#
- 1...Qe5
- 2.Qxe5#
- 2.c8Q#
- 2.c8B#
- 1...Qb1
- 2.Qe5#
- 2.c8Q#
- 2.c8B#
- 1...Qa2
- 2.Qe5#
- 2.c8Q#
- 2.c8B#
- 1...Qb3
- 2.Qe5#
- 2.c8Q#
- 2.c8B#
- 1...Rb3
- 2.Sf4#
- 2.Qc4#
- 2.c8Q#
- 2.c8B#
- 1...Ra4
- 2.c8Q#
- 2.c8B#
- 1...Rc4
- 2.Qxc4#
- 2.c8Q#
- 2.c8B#
- 1...Rd4
- 2.Qe5#
- 2.c8Q#
- 2.c8B#
- 1...Re4
- 2.c8Q#
- 2.c8B#
- 1...Rf4
- 2.Sxf4#
- 2.c8Q#
- 2.c8B#
- 1...Rb5
- 2.Sf4#
- 2.c8Q#
- 2.c8B#
- 1...Rb6
- 2.Sf4#
- 2.Qc4#
- 2.c8Q#
- 2.c8B#
- 1...Rb7
- 2.Sf4#
- 2.Qc4#
- 1...Rb8
- 2.Sf4#
- 2.Qc4#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8B#
- 1...Rh7
- 2.Sg5#
- 2.c8Q#
- 2.c8B#
- 1...Rg8
- 2.c8Q#
- 2.c8B#
- 1...Bd3
- 2.c8Q#
- 2.c8B#
- 1...Be4
- 2.Sf4#
- 2.c8Q#
- 2.c8B#
- 1...Bg6
- 2.Sg5#
- 1...Bh7
- 2.c8Q#
- 2.c8B#
- 1...Bd8
- 2.Sxd8#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Bf8
- 2.Sd8#
- 2.c8Q#
- 2.c8B#
- 1...Sa1
- 2.c8Q#
- 2.c8B#
- 1...Se1
- 2.c8Q#
- 2.c8B#
- 1...Sa3
- 2.c8Q#
- 2.c8B#
- 1...Sd4
- 2.Qe5#
- 2.c8Q#
- 2.c8B#
- 1...Rg6!
- threat
- 1.dxe7?
- threat
- 2.Sd8#
- 2.Qd6#
- 1...Rxf7
- 2.Bd7#
- 1...Qe5
- 2.Sd8#
- 2.Qxe5#
- 1...Rd4
- 2.Qe5#
- 1...Rb8
- 2.Sf4#
- 2.Qd6#
- 1...Bd3
- 2.Sd8#
- 1...Be4
- 2.Sf4#
- 2.Sd8#
- 1...Bg6
- 2.Sg5#
- 2.Sd8#
- 1...Bh7
- 2.Sd8#
- 1...Qd4!
- threat
- 1.Rg6?
- Keys
- 1.R4h5!
- threat
- 2.Qxf5#
- 1...Rxf7
- 2.Bd7#
- 1...Bxd6
- 2.Qxd6#
- 1...Qe5
- 2.Qxe5#
- 1...Rf4
- 2.Sxf4#
- 1...Rb5
- 2.Sf4#
- 1...Rg5
- 2.Sxg5#
- 1...Bd3
- 2.Qd5#
- 1...Be4
- 2.Sf4#
- 1...Bg6
- 2.Sg5#
- 1...Bh7
- 2.Qd5#
- 1...Sd4
- 2.Qe5#
- threat
- 1.R4h5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- Q(a);N_GUARD::QAR1(E)
- Q(a);N_GUARD,P_PINP(C)::QAR1(E),XQ(a)
- R(d);N_GUARD::QAB(E),XR(d)
- R(d);S_CUTQ(a)::QAR1(E)
- R(d);N_GUARD::S(A),XR(d)
- R(d);N_GUARD::S(A)
- R(j);N_GUARD::S(I),XR(j)
- R(j);SBLOCK,XS(I)::B(J)
- R(j);N_GUARD::S(I)
- B(f);S_CUTR(d)::S(A)
- B(f);N_SPINS(h),S_CUTR(j)::S(I)
- B(i);OGATE,P_PINP(C),XP(G)::QAR1(E),XB(i)
- B(i);N_GUARD::S(I),XB(i)
- B(i);N_GUARD::S(I)
- S(b);P_PINS(A),S_CUTQ(a)::QAR1(E)
- Tries
- Try
- R(H);
- Threat
- S(I)
- Vars
- R(j);SBLOCK,XS(I)::B(J)
- B(i);OGATE,P_PINP(C),XP(G)::QAR1(E),XB(i)
- Refutation
- R(j);N_SPINS(h),XR(H)
- Try
- P(F);
- Threat
- P=Q
- Vars
- R(j);XS(I)::P=Q
- B(i);OGATE,P_PINP(C),XP(G)::QAR1(E),XB(i)
- Q(a);::P=Q
- R(d);::P=Q
- R(j);::P=Q
- B(f);::P=Q
- B(f);N_SPINS(h),S_CUTR(j)::S(I)
- S(b);P_PINS(A)::P=Q
- Refutation
- R(j);N_SPINS(h)
- Try
- P(G);XB(i)
- Threat
- DUALS(2)
- Vars
- R(j);SBLOCK,XS(I)::B(J)
- R(d);S_CUTQ(a)::QAR1(E)
- B(f);::S(I)
- Refutation
- Q(a);
- Try
- Actual
- R(D);
- Threat
- QAB1(E),XB(f)
- Vars
- R(j);SBLOCK,XS(I)::B(J)
- B(i);OGATE,P_PINP(C),XP(G)::QAR1(E),XB(i)
- Q(a);N_GUARD,P_PINP(C)::QAR1(E),XQ(a)
- R(d);N_GUARD::S(A),XR(d)
- R(d);N_GUARD::S(A)
- R(j);N_GUARD::S(I),XR(j)
- B(f);::QAB1(E)
- B(f);S_CUTR(d)::S(A)
- B(f);N_SPINS(h),S_CUTR(j)::S(I)
- S(b);P_PINS(A),S_CUTQ(a)::QAR1(E)
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).