MESON Chess Problem Database

Problem Display
PID: 73175 (2nR2bb/8/7p/2N1k1pQ/2p3PN/K1Pq3n/3BPRB1/8 w - - 0 1)

Herpai, S Ferenc

5th Prize, Magyar Sakkvilag, 1937

2nR2bb/8/7p/2N1k1pQ/2p3PN/K1Pq3n/3BPRB1/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Sg6#
      • 2.Rf5#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Qg6
      • 2.Sxg6#
    • 1...Qxd2
      • 2.Sg6#
      • 2.Rf5#
    • 1...Qxc3+
      • 2.Bxc3#
    • 1...Qe3
      • 2.Sg6#
      • 2.Rf5#
    • 1...Qg3
      • 2.Sg6#
      • 2.Rf5#
    • 1...Qd4
      • 2.Sg6#
      • 2.Rf5#
      • 2.cxd4#
    • 1...Qd5
      • 2.Sg6#
      • 2.Rf5#
    • 1...Qd6
      • 2.Rf5#
  • Tries
    • 1.Qe8+?
      • 1...Be6
        • 2.Qxe6#
        • 2.Qxh8#
      • 1...Se7!
  • Keys
    • 1.Qxh6!
      • threat
        • 2.Qxh8#
      • 1...Qxc3+
        • 2.Bxc3#
      • 1...Qxd8
        • 2.Rf5#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Qg6
        • 2.Sxg6#
      • 1...Qh7
        • 2.Sf3#
      • 1...Qf3
        • 2.Sxf3#
      • 1...Qd6
        • 2.Rf5#
      • 1...Qd7
        • 2.Sxd7#
      • 1...Bh7
        • 2.Qe6#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bg7
        • 2.Qxg7#

This is a version of 207978

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD,N_PINP(F),N_SPINP(e)::R1(C),XQ(a)
    • Q(a);N_GUARD,N_PINP(F)::S(H),XQ(a)
    • Q(a);CHECK,OGATE,XP(F)::B(A),XQ(a)
    • Q(a);N_GUARD,N_PINP(F),P_PINS(I)::R1(C)
  • Tries
    • Try
      • Q(J);CHECK,N_PINP(e)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • Q(J);N_PINP(e),XP(f)
    • Threat
      • QAB(J),XB(i)
    • Vars
      • Q(a);CHECK,OGATE,XP(F)::B(A),XQ(a)
      • Q(a);N_GUARD,N_PINP(F),XR(K)::R1(C)
      • Q(a);N_GUARD,N_PINP(F)::R1(C),XQ(a)
      • Q(a);N_GUARD,N_PINP(F)::S(H),XQ(a)
      • Q(a);N_GUARD,N_PINP(F)::S(H)
      • Q(a);N_GUARD::S(H),XQ(a)
      • Q(a);N_GUARD,N_PINP(F),P_PINS(I)::R1(C)
      • Q(a);N_GUARD,N_PINP(F)::S(I),XQ(a)
      • B(h);N_GUARD::QAR1(J)
      • B(i);N_GUARD::QAB1(J),XB(i)
      • B(i);N_GUARD::QAB(J),XB(i)
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