MESON Chess Problem Database

Problem Display
PID: 45965 (R7/Rp1p1k1n/3K1PpP/3pp1QN/2p5/B7/B7/8 w - - 0 1)

Barnes, Barry Peter

5th HM., The Problemist, 2002/II

R7/Rp1p1k1n/3K1PpP/3pp1QN/2p5/B7/B7/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf6
      • 2.Qxf6#
    • 1...c3
      • 2.Bxd5#
    • 1...d4
      • 2.Bxc4#
    • 1...e4
      • 2.Qxd5#
    • 1...gxh5
      • 2.Qg7#
    • 1...b5
      • 2.Rxd7#
    • 1...b6
      • 2.Rxd7#
  • Tries
    • 1.Kxd5?
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Sxg5
        • 2.Rf8#
      • 1...gxh5
        • 2.Qg7#
      • 1...Sf8
        • 2.Rxf8#
      • 1...c3
        • 2.Kd6#
      • 1...b5
        • 2.Rxd7#
      • 1...b6
        • 2.Rxd7#
      • 1...d6
        • 2.Rxb7#
      • 1...e4!
    • 1.Rxb7?
      • threat
        • 2.Rxd7#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Sf8!
  • Keys
    • 1.Kxd7!
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Sf8+
        • 2.Rxf8#
      • 1...Sxg5
        • 2.Rf8#
      • 1...gxh5
        • 2.Qg7#
      • 1...c3
        • 2.Bxd5#
      • 1...d4
        • 2.Bxc4#
      • 1...e4
        • 2.Qxd5#
      • 1...b5
        • 2.Kd6#
      • 1...b6
        • 2.Kd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE,XP(F)::QAR1(C),XS(h)
    • P(a);OGATE,P_SPINP(b)::B(A),XP(b)
    • P(b);OGATEB,P_SPINP(a)::B(A),XP(a)
    • P(c);OGATE::QAB(C),XP(b)
    • P(d);OGATE,XS(D)::QAR1(C)
    • P(e);OGATE,P_SPINP(f)::R(H),XP(f)
  • Tries
    • Try
      • K(E);P-FLIGHT,XP(b)
      • Vars
        • S(h);CHECK,OGATE,XP(F)::QAR1(C),XS(h)
        • S(h);N_GUARD,XQ(C)::R1(I)
        • P(d);OGATE,XS(D)::QAR1(C)
        • S(h);N_GUARD::R1(I),XS(h)
        • P(a);::B(A)+K(E)
        • P(e);OGATE,P_SPINP(f)::R(H),XP(f)
        • P(f);OGATEB,P_SPINP(e)::R(H),XP(e)
      • Refutation
        • P(c);
    • Try
      • R(H);P_PINP(f),XP(e)
      • Threat
        • R(H),XP(f)
      • Vars
        • S(h);OGATE,XP(F)::QAR1(C),XS(h)
      • Refutation
        • S(h);
  • Actual
    • K(E);P-FLIGHT,XP(f)
    • Vars
      • S(h);CHECK,OGATE,XP(F)::QAR1(C),XS(h)
      • S(h);CHECK,N_GUARD::R1(I),XS(h)
      • S(h);N_GUARD,XQ(C)::R1(I)
      • P(d);OGATE,XS(D)::QAR1(C)
      • P(a);OGATE,P_SPINP(b)::B(A),XP(b)
      • P(b);OGATEB,P_SPINP(a)::B(A),XP(a)
      • P(c);OGATE::QAB(C),XP(b)
      • P(e);::R(H)+K(E)
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