MESON Chess Problem Database
Problem Display
PID: 268233 (8/3N2K1/3B1R1p/3p4/Qq1Nk1P1/R1br1p2/2P1nP2/8 w - - 0 1)
Petite, Efren
2nd Prize, KeyStip 20. Ty., 1978
#2
10 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxa3
- 2.Re6#
- 1...Qa5
- 2.Re6#
- 1...Qc5
- 2.Sxc5#
- 2.Re6#
- 1...Qb1
- 2.Sc5#
- 2.Re6#
- 1...Qb2
- 2.Sc5#
- 2.Re6#
- 1...Qb3
- 2.Sc5#
- 2.Re6#
- 1...Qxd4
- 2.Sc5#
- 1...Qb5
- 2.Re6#
- 1...Qb6
- 2.Re6#
- 1...Qb7
- 2.Re6#
- 1...Qb8
- 2.Sc5#
- 2.Re6#
- 1...Rxd4
- 2.Re6#
- 1...Bxd4
- 2.cxd3#
- 1...Sc1
- 2.Rf4#
- 1...Sg1
- 2.Rf4#
- 1...Sg3
- 2.Rf4#
- 1...Sxd4
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...Qxa3
- Tries
- 1.Sxe2?
- threat
- 2.Sc5#
- 1...Bxf6+
- 2.Sxf6#
- 1...d4
- 2.Qc6#
- 1...Rd4
- 2.Sg3#
- 2.Rf4#
- 2.Re6#
- 1...Bd4
- 2.Sg3#
- 2.cxd3#
- 1...fxe2!
- threat
- 1.Sb3?
- threat
- 2.Sdc5#
- 1...Bxf6+
- 2.Sxf6#
- 1...d4
- 2.Qc6#
- 1...Rd4
- 2.Re6#
- 1...Sd4
- 2.Rf4#
- 1...Bd4!
- threat
- 1.Sf5?
- threat
- 2.Sc5#
- 1...Bxf6+
- 2.Sxf6#
- 1...d4
- 2.Qc6#
- 1...Rd4
- 2.Re6#
- 1...Bd4
- 2.cxd3#
- 1...Sd4
- 2.Sg3#
- 1...Be5!
- threat
- 1.Sc6?
- threat
- 2.Sc5#
- 1...Bxf6+
- 2.Sxf6#
- 1...Rd4
- 2.Re6#
- 1...Bd4
- 2.cxd3#
- 1...Sd4
- 2.Rf4#
- 1...d4!
- threat
- 1.Se6?
- threat
- 2.Sdc5#
- 1...Bxf6+
- 2.Sxf6#
- 1...d4
- 2.Qc6#
- 1...Bd4
- 2.cxd3#
- 1...Sd4
- 2.Rf4#
- 1...Rd4!
- threat
- 1.Sc5+?
- 1...Qxc5
- 2.Re6#
- 1...Kxd4!
- 1...Qxc5
- 1.Qxb4?
- threat
- 2.Sc5#
- 2.Re6#
- 1...Bxd4
- 2.Sc5#
- 2.cxd3#
- 1...Sf4
- 2.Sc5#
- 2.Rxf4#
- 1...Bxb4!
- threat
- 1.Sxe2?
- Keys
- 1.Sb5!
- threat
- 2.Sc5#
- 1...Bxf6+
- 2.Sxf6#
- 1...d4
- 2.Qa8#
- 1...Rd4
- 2.Re6#
- 1...Bd4
- 2.cxd3#
- 1...Sd4
- 2.Rf4#
- threat
- 1.Sb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- Q(e);XR(C)::R(H)
- Q(e);::R(H)
- Q(e);N_GUARD,P_PINR(H),P_SPINQ(e),XS(E)::S(I)
- Q(e);P_PINS(I)::R(H)
- R(c);SBLOCK,XS(E)::R(H)
- B(b);P_PINR(H),SBLOCK,XS(E)::P(A),XR(c)
- S(a);N_GUARD::R1(H)
- S(a);N_GUARD,SBLOCK,XS(E)::R1(H)
- S(a);N_GUARD::R1(H),XS(a)
- Tries
- Try
- S(E);P_PINQ(e),P_SPINR(H),XS(a)
- Threat
- S(I)
- Vars
- B(b);CHECK,XR(H)::S(I),XB(b)
- P(g);N_PINR(H),N_SPINQ(e),OGATEB::QAB(D)
- Refutation
- P(d);XS(E)
- Try
- S(E);P_PINQ(e),P_SPINR(H)
- Threat
- S(I)
- Vars
- B(b);CHECK,XR(H)::S(I),XB(b)
- P(g);N_PINR(H),N_SPINQ(e),OGATEB::QAB(D)
- R(c);N_PINR(H),N_SPINQ(e)::R(H)
- S(a);N_PINR(H),N_SPINQ(e)::R1(H)
- Refutation
- B(b);N_SPINQ(e)
- Try
- S(E);P_PINQ(e),P_SPINR(H)
- Threat
- S(I)
- Vars
- B(b);CHECK,XR(H)::S(I),XB(b)
- P(g);N_PINR(H),N_SPINQ(e),OGATEB::QAB(D)
- R(c);N_PINR(H),N_SPINQ(e)::R(H)
- B(b);N_SPINQ(e)::P(A),XR(c)
- S(a);N_GUARD,N_PINR(H),N_SPINQ(e),SBLOCK::S(E)
- Refutation
- B(b);
- Try
- S(E);P_PINQ(e),P_SPINR(H)
- Threat
- S(I)
- Vars
- B(b);CHECK,XR(H)::S(I),XB(b)
- R(c);N_PINR(H),N_SPINQ(e)::R(H)
- B(b);N_SPINQ(e)::P(A),XR(c)
- S(a);N_PINR(H),N_SPINQ(e)::R1(H)
- Refutation
- P(g);N_PINR(H),N_SPINQ(e)
- Try
- S(E);P_PINQ(e),P_SPINR(H)
- Threat
- S(I)
- Vars
- B(b);CHECK,XR(H)::S(I),XB(b)
- P(g);N_PINR(H),N_SPINQ(e),OGATEB::QAB(D)
- B(b);N_SPINQ(e)::P(A),XR(c)
- S(a);N_PINR(H),N_SPINQ(e)::R1(H)
- Refutation
- R(c);N_PINR(H),N_SPINQ(e)
- Try
- S(I);CHECK
- Vars
- Q(e);XS(I)::R(H)
- Refutation
- K(f);P-FLIGHT,P_SPINQ(e),XS(E)
- Try
- Q(D);XQ(e)
- Threat
- DUALS(2)
- Refutation
- B(b);XQ(D)
- Try
- Actual
- S(E);P_PINQ(e),P_SPINR(H)
- Threat
- S(I)
- Vars
- B(b);CHECK,XR(H)::S(I),XB(b)
- P(g);N_PINR(H),N_SPINQ(e),OGATEB::QAB(D)
- R(c);N_PINR(H),N_SPINQ(e)::R(H)
- B(b);N_SPINQ(e)::P(A),XR(c)
- S(a);N_PINR(H),N_SPINQ(e)::R1(H)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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