MESON Chess Problem Database

Problem Display
PID: 74924 (1R2n1r1/1p1kp1p1/1Kp1npN1/1p1b4/1p1RN1Bb/Q7/8/8 w - - 0 1)

Golha, Jan

3rd HM., Mat 64, 2001

1R2n1r1/1p1kp1p1/1Kp1npN1/1p1b4/1p1RN1Bb/Q7/8/8

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rf8
      • 2.Sxf8#
    • 1...Sd6
      • 2.Sc5#
    • 1...b3
      • 2.Qxe7#
    • 1...f5
      • 2.Se5#
  • Tries
    • 1.Rxd5+?
      • 1...Sd6
        • 2.Sc5#
      • 1...cxd5!
    • 1.Rxb7+?
      • 1...Kc8
        • 2.Qa8#
      • 1...Kd8
        • 2.Qa8#
      • 1...Sc7!
    • 1.Qg3?
      • threat
        • 2.Sc5#
      • 1...c5
        • 2.Sxc5#
      • 1...f5
        • 2.Se5#
      • 1...Bxg3!
    • 1.Qh3?
      • threat
        • 2.Bxe6#
      • 1...Sd6
        • 2.Sc5#
      • 1...f5
        • 2.Se5#
      • 1...Sc7!
    • 1.Qa8?
      • threat
        • 2.Rd8#
      • 1...Sd6
        • 2.Sc5#
      • 1...f5
        • 2.Se5#
      • 1...Sc7!
  • Keys
    • 1.Qxb4!
      • threat
        • 2.Qxe7#
      • 1...Sd6
        • 2.Sc5#
      • 1...c5
        • 2.Qxb5#
      • 1...f5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(m);N_GUARD::S(F),XR(m)
    • S(l);N_SPINB(d),SBLOCK::S(C)
    • P(a);OGATE::QAR1(A),XP(j)
    • P(g);N_GUARD,N_SPINS(f)::S(F)
  • Tries
    • Try
      • R(B);CHECK,XB(d)
      • Vars
        • S(l);N_SPINS(f),P_SPINS(l)::S(C)
      • Refutation
        • P(e);XR(B)
    • Try
      • R(G);CHECK,XP(h)
      • Vars
        • K(i);N_SPINB(d),S_FLIGHT::QAR2(A)
        • K(i);N_SPINS(f),P-FLIGHT::QAR(A)
      • Refutation
        • S(l);
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • P(e);::S(C),XP(e)
        • P(g);N_GUARD,N_SPINS(f)::S(F)
      • Refutation
        • B(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • B(D),XS(f)
      • Vars
        • S(l);N_SPINB(d),SBLOCK::S(C)
        • P(g);N_GUARD,N_SPINS(f)::S(F)
      • Refutation
        • S(l);
    • Try
      • Q(A);
      • Threat
        • R1(G)
      • Vars
        • S(l);N_SPINB(d),SBLOCK::S(C)
        • P(g);N_GUARD,N_SPINS(f)::S(F)
      • Refutation
        • S(l);
  • Actual
    • Q(A);XP(a)
    • Threat
      • QAR1(A),XP(j)
    • Vars
      • S(l);N_SPINB(d),SBLOCK::S(C)
      • P(e);OGATEB::QAB(A),XP(c)
      • P(g);N_GUARD,N_SPINS(f)::S(F)
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Developed and maintained by Brian Stephenson.
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