MESON Chess Problem Database

Problem Display
PID: 162769 (6b1/8/4NQpk/4n3/8/2K1R1pr/7P/7R w - - 0 1)

Sag, Andy

OzProblems, 2010

6b1/8/4NQpk/4n3/8/2K1R1pr/7P/7R

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kh5
      • 2.Qg5#
    • 1...Kh7
      • 2.Qg7#
    • 1...Rh4
      • 2.Qxh4#
    • 1...Rh5
      • 2.Qg7#
    • 1...Bf7
      • 2.Qh8#
    • 1...Bh7
      • 2.Qg5#
    • 1...gxh2
      • 2.Rxh3#
    • 1...g2
      • 2.Rxh3#
  • Tries
    • 1.Qf8+?
      • 1...Kh7
        • 2.Qg7#
      • 1...Kh5!
  • Keys
    • 1.Rxg3!
      • threat
        • 2.Rxh3#
      • 1...Rxg3+
        • 2.hxg3#
      • 1...Kh5
        • 2.Qg5#
      • 1...Kh7
        • 2.Rxh3#
        • 2.Qg7#
      • 1...Rxh2
        • 2.Rxh2#
      • 1...Bxe6
        • 2.Qh8#
      • 1...Rh4
        • 2.Qxh4#
      • 1...Rh5
        • 2.Qg7#
      • 1...Sf3
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • K(e);N_SPINP(d),P-FLIGHT::QAR1(F)
    • R(b);N_GUARD::QAR2(F),XR(b)
    • R(b);SBLOCK::QAB1(F)
    • B(f);N_GUARD::QAR2(F)
    • B(f);SBLOCK::QAB1(F)
    • P(a);OGATE,P_PINR(D),XP(B)::R(D),XR(b)
    • P(a);OGATE,P_PINR(D)::R(D),XR(b)
  • Tries
    • Try
      • Q(F);CHECK,N_PINP(d)
      • Vars
        • K(e);P-FLIGHT::QAR1(F)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(D);P_SPINR(D),XP(a)
    • Threat
      • R(D),XR(b)
    • Vars
      • R(b);CHECK,OGATE,XR(D)::R(A)+P(B),XR(b)
      • K(e);N_SPINP(d),P-FLIGHT::QAR1(F)
      • R(b);N_PINR(D),OGATE,P_SPINR(b),XP(B)::R(A),XR(b)
      • B(f);N_GUARD,XS(E)::QAR2(F)
      • R(b);N_GUARD,N_PINR(D)::QAR2(F),XR(b)
      • R(b);N_PINR(D),SBLOCK::QAB1(F)
      • S(c);N_GUARD,N_PINR(D)::QAR1(F),XP(d)
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