MESON Chess Problem Database
Problem Display
PID: 228269 (BB1q4/2r5/4p1R1/1NQnk3/3R2Pr/1b2N2p/2p5/2K5 w - - 0 1)
Ruiz, J
SEPA, 1944
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qg5
- 2.Bxc7#
- 2.Qd6#
- 1...Qf6
- 2.Bxc7#
- 2.Qd6#
- 1...Qd6
- 2.Qxd6#
- 1...Qxb8
- 2.Qd6#
- 1...Qc8
- 2.Qd6#
- 1...Qe8
- 2.Bxc7#
- 2.Qd6#
- 1...Qg8
- 2.Bxc7#
- 2.Qd6#
- 1...Qh8
- 2.Bxc7#
- 2.Qd6#
- 1...Ba4
- 2.Sc4#
- 1...Bc4
- 2.Sxc4#
- 1...Qg5
- Tries
- 1.Sd6?
- threat
- 2.Sf7#
- 2.Re4#
- 1...Qxb8
- 2.Re4#
- 1...Rxg4
- 2.Sxg4#
- 2.Sf7#
- 1...Rxc5
- 2.Re4#
- 1...Qf6
- 2.Re4#
- 1...Qe7
- 2.Re4#
- 1...Qd7
- 2.Re4#
- 1...Qe8
- 2.Re4#
- 1...Qf8
- 2.Re4#
- 1...Qg8
- 2.Re4#
- 1...Rhh7
- 2.Re4#
- 1...Rf7
- 2.Sdc4#
- 2.Sxf7#
- 2.Re4#
- 1...Qxd6!
- threat
- 1.Bxd5?
- threat
- 2.Re4#
- 2.Rxe6#
- 1...Qxd5
- 2.Bxc7#
- 1...Rxg4
- 2.Rxe6#
- 1...Bxd5
- 2.Sc4#
- 1...Qd6
- 2.Re4#
- 2.Qxd6#
- 1...Qf6
- 2.Bxb3#
- 2.Bc4#
- 2.Bxc7#
- 2.Re4#
- 2.Qd6#
- 2.Qxc7#
- 1...Qe7
- 2.Re4#
- 1...Qd7
- 2.Re4#
- 1...Qc8
- 2.Bxb3#
- 2.Bc4#
- 2.Re4#
- 2.Qd6#
- 1...Qe8
- 2.Bxb3#
- 2.Bc4#
- 2.Bxc7#
- 2.Re4#
- 2.Qd6#
- 2.Qxc7#
- 1...Qg8
- 2.Bxb3#
- 2.Bc4#
- 2.Bxc7#
- 2.Re4#
- 2.Qd6#
- 2.Qxc7#
- 1...Rh6
- 2.Re4#
- 1...exd5!
- threat
- 1.Bxc7+?
- 1...Qd6
- 2.Bxd6#
- 2.Qxd6#
- 1...Qxc7!
- 1...Qd6
- 1.Qe7?
- threat
- 2.Rg5#
- 2.Rxe6#
- 2.Qxe6#
- 1...Rxg4
- 2.Rxe6#
- 2.Qxe6#
- 1...Sxe3
- 2.Re4#
- 1...Sxe7
- 2.Re4#
- 1...Qd6
- 2.Rg5#
- 2.Qg5#
- 2.Qxd6#
- 1...Qd7
- 2.Rg5#
- 2.Qg5#
- 1...Qc8
- 2.Rg5#
- 2.Qg5#
- 2.Qd6#
- 1...Qe8
- 2.Rg5#
- 2.Rxe6#
- 2.Qg5#
- 2.Qd6#
- 1...Qf8
- 2.Rxe6#
- 2.Qxe6#
- 1...Qg8
- 2.Qg5#
- 2.Qd6#
- 1...Rh5
- 2.Rxe6#
- 2.Qxe6#
- 1...Rh6
- 2.Rg5#
- 2.Qxe6#
- 1...Sc3
- 2.Rg5#
- 1...Sb4
- 2.Re4#
- 2.Rg5#
- 1...Sf4
- 2.Re4#
- 2.Rg5#
- 1...Sb6
- 2.Re4#
- 2.Rg5#
- 1...Sf6
- 2.Rg5#
- 1...Qxe7!
- threat
- 1.Qc4?
- threat
- 2.Re4#
- 1...Bxc4
- 2.Sxc4#
- 1...Sc3
- 2.Rxe6#
- 1...Sf6
- 2.Rg5#
- 1...Rxg4!
- threat
- 1.Qxc7+?
- 1...Qd6
- 2.Qxd6#
- 1...Sxc7
- 2.Re4#
- 1...Qxc7!
- 1...Qd6
- 1.Sd6?
- Keys
- 1.Qxc2!
- threat
- 2.Re4#
- 1...Rxg4
- 2.Sxg4#
- 1...Bxc2
- 2.Sc4#
- 1...Sc3
- 2.Qh2#
- 1...Sf6
- 2.Rg5#
- threat
- 1.Qxc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(i);N_GUARD,N_SPINR(h)::QAB1(F),XQ(i)
- Q(i);N_GUARD,N_SPINR(h),XB(I)::QAB1(F)
- Q(i);N_GUARD::QAB1(F)
- B(b);N_GUARD::S(B)
- B(b);N_GUARD::S(B),XB(b)
- Tries
- Try
- S(E);N_PINR(h)
- Threat
- DUALS(2)
- Vars
- Q(i);XB(I)::R1(C)
- R(h);N_SPINS(e),XQ(F)::R1(C)
- Q(i);::R1(C)
- R(d);::R1(C)
- Refutation
- Q(i);XS(E)
- Try
- B(H);XS(e)
- Threat
- DUALS(2)
- Vars
- Q(i);N_GUARD,P_SPINQ(i),XB(H)::B(I),XR(h)
- R(d);XP(D)::R1(G),XP(g)
- B(b);N_GUARD,P_SPINB(b),XB(H)::S(B)
- Q(i);::R1(C)
- R(d);::R1(C)
- Refutation
- P(g);P_SPINP(g),XB(H)
- Try
- B(I);CHECK,XR(h)
- Refutation
- Q(i);XB(I)
- Try
- Q(F);N_PINS(e),P_PINP(g)
- Threat
- DUALS(3)
- Vars
- S(e);XS(B)::R1(C)
- S(e);N_SPINP(g),XQ(F)::R1(C)
- S(e);::R(G)
- Refutation
- Q(i);N_SPINP(g),XQ(F)
- Try
- Q(F);N_PINS(e)
- Threat
- R1(C)
- Vars
- B(b);XQ(F)::S(B),XB(b)
- S(e);::R1(G),XP(g)
- S(e);SBLOCK,S_CUTQ(i)::R(G)
- Refutation
- R(d);XP(D)
- Try
- Q(F);CHECK,N_PINS(e),XR(h)
- Vars
- Q(i);N_GUARD,P_SPINQ(i)::QAB1(F),XQ(i)
- S(e);P_SPINS(e),XQ(F)::R1(C)
- Refutation
- Q(i);P_SPINQ(i),XQ(F)
- Try
- Actual
- Q(F);N_PINS(e),P_SPINQ(F),XP(a)
- Threat
- R1(C)
- Vars
- R(d);XP(D)::S(B),XR(d)
- B(b);N_GUARD,XQ(F)::S(B)
- S(e);N_PINQ(F)::QAB(F)
- S(e);SBLOCK,S_CUTQ(i)::R(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).