MESON Chess Problem Database

Problem Display
PID: 23954 (4R3/1Q6/3p2NB/1K1Nb3/3pk3/3R3P/4p1r1/5b1B w - - 0 1)

Hirschenson, Aaron

1st Comm., Wertheim MT, 1997

4R3/1Q6/3p2NB/1K1Nb3/3pk3/3R3P/4p1r1/5b1B

#2

9 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Sb4+?
      • 1...d5
        • 2.Rxe5#
      • 1...Kf5!
    • 1.Sdf4+?
      • 1...d5
        • 2.Rxe5#
      • 1...Kf5!
    • 1.Re3+?
      • 1...Kf5
        • 2.Sh4#
      • 1...dxe3!
    • 1.Qf7?
      • threat
        • 2.Qf3#
      • 1...Kxd3
        • 2.Qf5#
      • 1...e1S!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Sgf4#
        • 2.Sge7#
      • 1...Kxd3
        • 2.Sxe5#
      • 1...Kxd5
        • 2.Qb7#
      • 1...Kf5
        • 2.Sh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(g);P_SPINP(g)::R1(I),XB(f)
      • Refutation
        • K(e);N_SPINB(f),N_SPINR(c),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • P(g);P_SPINP(g)::R1(I),XB(f)
      • Refutation
        • K(e);N_SPINB(f),N_SPINR(c),S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(e);N_SPINB(f),N_SPINR(c),S_FLIGHT::S(F)
      • Refutation
        • P(d);XR(B)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • K(e);N_SPINB(f),N_SPINR(c),S_FLIGHT,XR(B)::QAB(H)
      • Refutation
        • P(b);P_PINR(B)
  • Actual
    • Q(H);
    • Threat
      • DUALS(2)
    • Vars
      • K(e);N_SPINB(f),N_SPINR(c),S_FLIGHT,XR(B)::QAB(H)+S(F),DCHECK,XB(f)
      • K(e);N_SPINB(f),OGATEB,P_SPINP(d),S_FLIGHT,XS(E)::QAB(H)
      • K(e);N_SPINB(f),N_SPINR(c),S_FLIGHT::QAB(H)+S(F),DCHECK
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