MESON Chess Problem Database

Problem Display
PID: 6959 (1NrR4/BB1q4/n1nP4/3kbR2/2p1N3/1P1P4/5Q2/1K5b w - - 0 1)

Neumann, Itzhak

Chess, 1935

1NrR4/BB1q4/n1nP4/3kbR2/2p1N3/1P1P4/5Q2/1K5b

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sc3#
      • 2.Qd4#
      • 2.bxc4#
    • 1...Qxd6
      • 2.Rxd6#
  • Tries
    • 1.dxc4+?
      • 1...Kxe4
        • 2.Qc2#
      • 1...Ke6!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qd4#
      • 1...Kxd6
        • 2.Rxd7#
      • 1...Qxf5
        • 2.bxc4#
      • 1...Qxb7
        • 2.dxc4#
      • 1...Sc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(g);OGATE,P_SPINQ(g),XP(G)::R1(K),XQ(g)
  • Tries
    • Try
      • P(D);CHECK,XP(b)
      • Vars
        • K(c);N_SPINB(d),S_FLIGHT,XS(E)::QAB(B)
      • Refutation
        • K(c);N_SPINB(d),N_SPINS(f),S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);N_SPINB(d),N_SPINS(f),OGATEB,P-FLIGHT,P_SPINQ(g),XP(G)::R1(K),XQ(g)
      • Q(g);N_SPINB(d),P_PINP(D),XR(F)::P(C),XP(b)
      • Q(g);N_SPINS(f),P_PINP(C),XB(I)::P(D),XP(b)
      • S(e);N_GUARD::QAR1(B),XS(e)
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