MESON Chess Problem Database

Problem Display
PID: 224801 (4B1NR/1n4p1/8/Q1b3kp/6pr/1n4Kp/5R2/8 w - - 0 1)

Krishnamachari, TA

British Chess Magazine, 1930

4B1NR/1n4p1/8/Q1b3kp/6pr/1n4Kp/5R2/8

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Qd2#
    • 1...Sd6
      • 2.Qd8#
  • Tries
    • 1.Rh6?
      • threat
        • 2.Rg6#
      • 1...g6
        • 2.Rxg6#
      • 1...gxh6!
    • 1.Qd2+?
      • 1...Be3
        • 2.Qxe3#
        • 2.Qd5#
      • 1...Sxd2!
    • 1.Qd8+?
      • 1...Be7
        • 2.Qxe7#
        • 2.Qd5#
      • 1...Sxd8!
  • Keys
    • 1.Sh6!
      • threat
        • 2.Rf5#
      • 1...gxh6
        • 2.Rg8#
      • 1...Sd4
        • 2.Qd2#
      • 1...Sd6
        • 2.Qd8#
      • 1...g6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(C)
    • S(h);N_GUARD::QAB(C)
  • Tries
    • Try
      • R(F);
      • Threat
        • R1(F)
      • Vars
        • P(i);::R1(F),XP(i)
      • Refutation
        • P(i);XR(F)
    • Try
      • Q(C);CHECK,N_PINB(e)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK,N_PINB(e)
      • Refutation
        • S(h);XQ(C)
  • Actual
    • S(E);
    • Threat
      • R1(A)
    • Vars
      • P(i);OGATEB,SBLOCK,XS(E)::R(F)
      • S(a);N_GUARD::QAB(C)
      • S(h);N_GUARD::QAB(C)
      • P(i);SBLOCK::S(E)
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