MESON Chess Problem Database

Problem Display
PID: 86676 (3N4/8/3p1Qp1/5n2/1K2k3/2p1n1PP/2N1R2R/1B6 w - - 0 1)

Grossman, Itzhak

Hirschenson, Aaron

Themes-64, 1960

3N4/8/3p1Qp1/5n2/1K2k3/2p1n1PP/2N1R2R/1B6

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Se1#
    • 1...Kf3
      • 2.Rxe3#
    • 1...Kd5
      • 2.Qe6#
  • Tries
    • 1.Rxe3+?
      • 1...Kd5
        • 2.Ba2#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sxe3!
    • 1.Rhf2?
      • 1...Kd3
        • 2.Se1#
      • 1...Kd5
        • 2.Qe6#
      • 1...Sxg3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sh4
        • 2.Qd4#
      • 1...Sh6
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Sg7
        • 2.Qd4#
      • 1...g5
        • 2.Qxf5#
      • 1...d5!
    • 1.Qd4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Sxd4!
  • Keys
    • 1.Qxg6!
      • 1...Kd3
        • 2.Rxe3#
      • 1...Kf3
        • 2.Se1#
      • 1...Kd5
        • 2.Qe6#
      • 1...Ke5
        • 2.Qe6#
      • 1...d5
        • 2.Rxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(b),S_FLIGHT::B(A)+S(B),DCHECK
    • K(c);N_SPINS(b),P_SPINS(d),S_FLIGHT::R1(C),XS(b)
    • K(c);N_SPINS(b),S_FLIGHT::QAB1(H)
  • Tries
    • Try
      • R(C);CHECK,XS(b)
      • Refutation
        • S(d);XR(C)
    • Try
      • R(D);
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT::B(A)+S(B),DCHECK
        • K(c);N_SPINS(b),S_FLIGHT::QAB1(H)
        • S(d);N_GUARD,XP(E)::QAR1(H)
        • S(d);N_GUARD::QAR1(H),XS(d)
        • S(d);N_GUARD::QAR1(H)
        • P(f);N_GUARD::QAB1(H),XS(d)
      • Refutation
        • P(e);
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);N_SPINS(b),OGATE,S_FLIGHT::QAR1(H)
      • Refutation
        • S(d);XQ(H)
  • Actual
    • Q(H);XP(f)
    • Vars
      • K(c);N_SPINS(b),P_SPINS(d),S_FLIGHT::R1(C),XS(b)
      • K(c);N_SPINS(b),S_FLIGHT::S(B)
      • K(c);N_SPINS(b),S_FLIGHT::QAB1(H)
      • K(c);P-FLIGHT::QAR1(H)
      • P(e);SBLOCK::R1(C),XS(b)
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