MESON Chess Problem Database
Problem Display
PID: 140767 (2BB1b2/1KN3rn/1p1k1n1R/1p6/1PP1RP2/8/bp1NP1qp/7Q w - - 0 1)
Ellerman, Arnoldo
Problemas, 1945
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Rd4#
- 2.Re6#
- 1...Qh3
- 2.Rd4#
- 1...Qxe4+
- 2.Sxe4#
- 1...Qg1
- 2.Re6#
- 1...Qxe2
- 2.Rd4#
- 1...Qf2
- 2.Re6#
- 1...Qg3
- 2.Rd4#
- 2.Re6#
- 1...Qg4
- 2.Rd4#
- 1...Qg5
- 2.Re6#
- 1...Qg6
- 2.Re6#
- 1...Rg3
- 2.Sxb5#
- 2.Se8#
- 1...Rg4
- 2.Sxb5#
- 2.Se8#
- 1...Rg5
- 2.Se8#
- 1...Rg6
- 2.Sxb5#
- 1...Rxc7+
- 2.Bxc7#
- 1...Rg8
- 2.Sxb5#
- 2.Se8#
- 1...Be7
- 2.Sxb5#
- 2.Se8#
- 1...Qf1
- Tries
- 1.Bxf6?
- threat
- 2.Be7#
- 1...Qxe4+
- 2.Sxe4#
- 1...Sxf6
- 2.Rxf6#
- 1...Qg6
- 2.Rd4#
- 2.Re6#
- 1...Rg6
- 2.Sxb5#
- 2.Se8#
- 1...Re7
- 2.Be5#
- 2.Bxe7#
- 1...Be7
- 2.Sxb5#
- 2.Se8#
- 2.Be5#
- 2.Bxe7#
- 1...Rxc7+!
- threat
- 1.Be7+?
- 1...Bxe7
- 2.Sxb5#
- 2.Se8#
- 1...Rxe7!
- 1...Bxe7
- 1.Qxg2?
- threat
- 2.Rd4#
- 2.Re6#
- 1...Rxc7+
- 2.Bxc7#
- 1...Rg5
- 2.Se8#
- 2.Re6#
- 1...Rg6
- 2.Sxb5#
- 2.Re6#
- 1...Re7
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Bxc4!
- threat
- 1.Bxf6?
- Keys
- 1.Qd1!
- threat
- 2.Sb1#
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 1...Qxe4+
- 2.Sxe4#
- 1...Rxc7+
- 2.Bxc7#
- 1...Qxe2
- 2.Rd4#
- 1...Bxc4
- 2.Sxc4#
- 1...b1Q
- 2.Sxb1#
- 1...b1S
- 2.Sxb1#
- 1...b1B
- 2.Sxb1#
- 1...b1R
- 2.Sxb1#
- 1...h1Q
- 2.Sf1#
- 1...h1R
- 2.Sf1#
- 1...Qf1
- 2.Sxf1#
- 2.Rd4#
- 2.Re6#
- 1...Qh1
- 2.Sf1#
- 1...Qf3
- 2.Sxf3#
- 1...Qh3
- 2.Sf3#
- 2.Rd4#
- 1...Qg1
- 2.Re6#
- 1...Qf2
- 2.Re6#
- 1...Qg3
- 2.Sf3#
- 2.Rd4#
- 2.Re6#
- 1...Qg5
- 2.Re6#
- 1...Qg6
- 2.Re6#
- 1...Rg3
- 2.Sf3#
- 2.Sxb5#
- 2.Se8#
- 1...Rg5
- 2.Se8#
- 1...Rg6
- 2.Sxb5#
- 1...Bb1
- 2.Sxb1#
- 1...Bb3
- 2.Sxb3#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 11
- REMOVED MATES = 2
- Sets
- Q(c);N_PINR(F)::R(F)
- Q(c);CHECK,XR(F)::S(B),XQ(c)
- Q(c);N_PINR(F)::R1(F)
- Q(c);N_PINR(F),XP(C)::R(F)
- Q(c);N_PINR(F),N_SPINS(h)::R1(F)
- R(i);N_PINS(J)::S(J)
- R(i);N_PINS(J),N_SPINS(h)::S(J),XP(e)
- R(i);CHECK,OGATE,XS(J)::B(L),XR(i)
- Tries
- Try
- B(L);XS(h)
- Threat
- R(H)+B(L),DCHECK
- Vars
- Q(c);CHECK,XR(F)::S(B),XQ(c)
- S(j);OGATE,P_SPINS(j),XB(L)::R(H),XS(j)
- Refutation
- R(i);CHECK,XS(J)
- Try
- B(L);CHECK,N_SPINS(J)
- Refutation
- R(i);P_PINS(J),XB(L)
- Try
- Q(A);N_SPINR(F),XQ(c)
- Threat
- DUALS(2)
- Vars
- R(i);CHECK,OGATE,XS(J)::B(L),XR(i)
- R(i);::R(F)
- S(j);::R(F)
- Refutation
- B(a);XP(E)
- Try
- Actual
- Q(A);
- Threat
- DUALS(4)
- Vars
- Q(c);CHECK,XR(F)::QAR(A)+S(B),DCHECK,XQ(c)
- R(i);CHECK,OGATE,XS(J)::B(L),XR(i)
- Q(c);N_PINR(F),XP(C)::R(F)
- B(a);XP(E)::QAR(A)+S(B),DCHECK,XB(a)
- P(b);::QAR(A)+S(B),XQ(b)
- P(b);::QAR(A)+S(B),XS(b)
- P(b);::QAR(A)+S(B),XB(b)
- P(b);::QAR(A)+S(B),XR(b)
- P(d);::QAR(A)+S(B)
- Q(c);::QAR(A)+S(B)
- Q(c);::QAR(A)+S(B),XQ(c)
- Q(c);N_PINR(F)::R1(F)
- Q(c);N_PINR(F),N_SPINS(h)::R1(F)
- R(i);N_PINS(J)::S(J)
- R(i);N_PINS(J),N_SPINS(h)::S(J),XP(e)
- B(a);::QAR(A)+S(B),XB(a)
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).