MESON Chess Problem Database

Problem Display
PID: 57619 (n1B3n1/K4p1P/R1p3p1/3pk3/1Q1N3P/B1P5/3PNb1r/1b3R2 w - - 0 1)

Neumann, Itzhak

The Chess Review, 1936

n1B3n1/K4p1P/R1p3p1/3pk3/1Q1N3P/B1P5/3PNb1r/1b3R2

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.h8Q#
      • 2.h8B#
    • 1...Be4
      • 2.Qd6#
    • 1...Be1
      • 2.Sxc6#
    • 1...Bg3
      • 2.Sxc6#
    • 1...Bxd4+
      • 2.Qxd4#
    • 1...Bxh4
      • 2.Sxc6#
    • 1...Sf6
      • 2.Qe7#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
    • 1...c5
      • 2.Sf3#
  • Tries
    • 1.d3?
      • threat
        • 2.Qd6#
      • 1...Bxd4+
        • 2.Qxd4#
        • 2.cxd4#
      • 1...Kf6
        • 2.h8Q#
        • 2.h8B#
      • 1...c5
        • 2.Sf3#
      • 1...Bxd3!
    • 1.h8Q+?
      • 1...Ke4
        • 2.Qxb1#
      • 1...Sf6
        • 2.Qe7#
      • 1...f6!
    • 1.h8B+?
      • 1...Ke4
        • 2.Qxb1#
      • 1...Sf6
        • 2.Qe7#
      • 1...f6!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Qd6#
      • 1...Bxd4+
        • 2.Qxd4#
        • 2.cxd4#
      • 1...Kf4
        • 2.Qd6#
      • 1...Kf6
        • 2.h8Q#
        • 2.h8B#
      • 1...Bxg3
        • 2.Sxc6#
      • 1...c5
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • K(e);P_SPINB(b),P_SPINP(f),S_FLIGHT::P=Q
    • B(a);SBLOCK::QAB1(F)
    • B(b);N_PINS(G)::S(G),XP(f)
    • B(b);CHECK,OGATE,XS(G)::QAB1(F),XB(b)
    • B(b);N_PINS(G),XP(H)::S(G),XP(f)
    • S(j);N_GUARD::QAR2(F)
    • S(j);N_GUARD::QAR2(F),XS(j)
    • P(f);N_PINS(G)::S(G)
  • Tries
    • Try
      • P(B);
      • Threat
        • QAB1(F)
      • Vars
        • K(e);P_SPINB(b),P_SPINP(f),S_FLIGHT::P=Q
        • P(f);N_PINS(G)::S(G)
      • Refutation
        • B(a);XP(B)
    • Try
      • P(K);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB(F),XB(a)
        • S(j);P_SPINS(j)::QAR2(F)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • P(K);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB(F),XB(a)
        • S(j);P_SPINS(j)::QAR2(F)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(C);
    • Threat
      • QAB1(F)
    • Vars
      • K(e);P_SPINB(b),S_FLIGHT::QAB(F)
      • K(e);P_SPINB(b),P_SPINP(f),S_FLIGHT::P=Q
      • B(b);N_PINS(G),XS(C)::S(G),XP(f)
      • P(f);N_PINS(G)::S(G)
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