MESON Chess Problem Database

Problem Display
PID: 147367 (5bbB/1p2N1rn/2p3Q1/7R/3kp2P/1P6/1n2PP2/N1R3K1 w - - 0 1)

Hashavit, Zvi

4th Place, Match: Denmark - Israel, 1959-1960

5bbB/1p2N1rn/2p3Q1/7R/3kp2P/1P6/1n2PP2/N1R3K1

#2

11 + 9

259 Thema Danicum 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb3
      • 2.Sxb3#
    • 1...Sd3
      • 2.e3#
    • 1...Sg5
      • 2.Qf6#
    • 1...e3
      • 2.Qg4#
    • 1...b5
      • 2.Sxc6#
    • 1...b6
      • 2.Sxc6#
  • Tries
    • 1.Bxg7+?
      • 1...Sf6
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Bxg7!
    • 1.Qxg7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Bxg7!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Sc2#
      • 1...Bxb3
        • 2.Sxb3#
      • 1...e3
        • 2.Qg4#
      • 1...Bd5
        • 2.Sf5#
      • 1...Sd3
        • 2.e3#
      • 1...Sg5
        • 2.Qc3#

There are these versions: 147368

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(i);XP(F)::S(A),XB(i)
    • S(a);SBLOCK::P(D)
    • S(g);N_PINQ(I)::QAB(I)
    • P(c);::QAR(I)
    • P(e);N_GUARD::S(J),XP(d)
  • Tries
    • Try
      • B(K);CHECK,N_SPINQ(I),XR(f)
      • Refutation
        • B(h);XB(K)
    • Try
      • Q(I);CHECK,N_SPINQ(I),XR(f)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB(I),XS(g)
      • Refutation
        • B(h);P_SPINB(h),XQ(I)
  • Actual
    • Q(I);
    • Threat
      • S(A)
    • Vars
      • B(i);XP(F)::S(A),XB(i)
      • P(c);::QAR(I)
      • B(i);SBLOCK::S(J)
      • S(a);SBLOCK::P(D)
      • S(g);N_PINQ(I)::QAB1(I)
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