MESON Chess Problem Database

Problem Display
PID: 187774 (1bkN3Q/2q4R/1B1P4/8/8/8/2p5/2K5 w - - 0 1)

Schuster, Zsigmond

Pesti Naplo, 1909

1bkN3Q/2q4R/1B1P4/8/8/8/2p5/2K5

#2

6 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd8
      • 2.Qxd8#
    • 1...Qc3
      • 2.d7#
    • 1...Qc4
      • 2.Se6#
      • 2.d7#
    • 1...Qc5
      • 2.Sc6#
      • 2.Se6#
      • 2.Sb7#
      • 2.d7#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qa7
      • 2.Sc6#
      • 2.Se6#
      • 2.Sb7#
    • 1...Qb7
      • 2.Sc6#
      • 2.Se6#
      • 2.Sxb7#
  • Tries
    • 1.Sc6+?
      • 1...Qd8
        • 2.Qxd8#
      • 1...Kb7!
    • 1.Se6+?
      • 1...Qd8
        • 2.Qxd8#
      • 1...Kb7!
    • 1.Sb7+?
      • 1...Qd8
        • 2.Qxd8#
      • 1...Kxb7!
  • Keys
    • 1.Qc3!
      • 1...Kxd8
        • 2.Qh8#
      • 1...Qxc3
        • 2.d7#
      • 1...Ba7
        • 2.Qxc7#
      • 1...Qc4
        • 2.d7#
      • 1...Qc5
        • 2.d7#
      • 1...Qc6
        • 2.d7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE,P_SPINQ(b),XS(E)::QAR1(F),XQ(b)
    • Q(b);N_GUARD::P(C)
    • Q(b);N_GUARD::QAR(F)+S(E),XQ(b)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(F),XQ(b)
      • Refutation
        • K(d);P_SPINQ(b),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(F),XQ(b)
      • Refutation
        • K(d);P_SPINQ(b),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(F),XQ(b)
      • Refutation
        • K(d);P_SPINQ(b),S_FLIGHT,XS(E)
  • Actual
    • Q(F);P_PINQ(b)
    • Vars
      • K(d);OGATEB,P-FLIGHT,XS(E)::QAR(F)
      • Q(b);N_SPINQ(b),XQ(F)::P(C)
      • B(c);N_GUARD::QAR1(F),XQ(b)
      • Q(b);::P(C)
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