MESON Chess Problem Database

Problem Display
PID: 96335 (2n5/q1B2K1Q/2R1Np2/1P1kb1Rn/Br1P1p2/8/8/8 w - - 0 1)

Colacrai, N

Problemas, 1966

2n5/q1B2K1Q/2R1Np2/1P1kb1Rn/Br1P1p2/8/8/8

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qb8
      • 2.Rc5#
    • 1...Qxa4
      • 2.Rc5#
    • 1...Qa5
      • 2.Rc5#
    • 1...Qa6
      • 2.Rc5#
    • 1...Qb7
      • 2.Rc5#
    • 1...Qa8
      • 2.Rc5#
    • 1...Rb3
      • 2.Bxb3#
    • 1...Sb6
      • 2.Rc5#
  • Tries
    • 1.Sxf4+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Sxf4!
    • 1.Bb3+?
      • 1...Rc4
        • 2.Bxc4#
      • 1...Rxb3!
    • 1.Rd6+?
      • 1...Kc4
        • 2.Qc2#
      • 1...Sxd6+!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qf3#
      • 1...Qxc7+
        • 2.Sxc7#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Qxd4
        • 2.Rc5#
      • 1...Rxd4
        • 2.Bb3#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Rb3
        • 2.Bxb3#
      • 1...Sg3
        • 2.Sxf4#
      • 1...f3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD,N_PINB(G)::R1(E),XQ(g)
    • Q(g);N_GUARD,N_PINB(G)::R1(E)
    • Q(g);N_GUARD,N_PINB(G),XB(A)::R1(E)
    • Q(g);N_GUARD::R1(E)
    • R(a);N_GUARD::B(A),XR(a)
    • S(h);S_CUTQ(g)::R1(E)
  • Tries
    • Try
      • S(F);CHECK,XP(b)
      • Vars
        • K(c);N_SPINB(d),P-FLIGHT,XP(B)::QAR1(I)
      • Refutation
        • S(e);XS(F)
    • Try
      • B(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • R(a);XB(A)
    • Try
      • R(E);CHECK
      • Vars
        • K(c);N_SPINB(d),S_FLIGHT::QAR2(I)
      • Refutation
        • S(h);CHECK,XR(E)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)
    • Vars
      • Q(g);CHECK,XB(G)::S(F),XQ(g)
      • S(h);CHECK,N_GUARD::R1(E),XS(h)
      • Q(g);N_GUARD,N_PINB(G),P_SPINQ(g),XP(B)::R1(E)
      • R(a);N_GUARD,P_SPINR(a),XP(B)::B(A)
      • Q(g);N_GUARD,N_PINB(G)::R1(E),XQ(g)
      • R(a);N_GUARD::B(A),XR(a)
      • S(e);N_GUARD::S(F),XP(b)
      • P(b);::QAB(I),XP(b)
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Developed and maintained by Brian Stephenson.
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