MESON Chess Problem Database

Problem Display
PID: 194285 (8/7Q/8/1P1PqR1N/2nrk2P/3p3K/3P4/8 w - - 0 1)

Weingruber, Istvan

Magyar Sakkvilag, 1917

8/7Q/8/1P1PqR1N/2nrk2P/3p3K/3P4/8

#2

8 + 5

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3+
      • 2.Sxg3#
    • 1...Qf6
      • 2.Sg3#
      • 2.Sxf6#
    • 1...Qc7
      • 2.Sf6#
    • 1...Qb8
      • 2.Sf6#
    • 1...Qh8
      • 2.Sg3#
    • 1...Qxd5
      • 2.Sg3#
      • 2.Sf6#
    • 1...Qe6
      • 2.Sg3#
    • 1...Qe7
      • 2.Sg3#
    • 1...Qe8
      • 2.Sg3#
      • 2.Sf6#
    • 1...Rxd5
      • 2.Rf4#
  • Tries
    • 1.Rf1+?
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Kxd5!
    • 1.Rf2+?
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Kxd5!
    • 1.Rf6+?
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Kxd5!
    • 1.Rf7+?
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Kxd5!
    • 1.Rf8+?
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Kxd5!
  • Keys
    • 1.Qe7!
      • 1...Kxd5
        • 2.Sf6#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Qxe7
        • 2.Sg3#
      • 1...Rxd5
        • 2.Rf4#
      • 1...Sxd2
        • 2.Qxe5#
      • 1...Qe6
        • 2.Sg3#
      • 1...Sb2
        • 2.Qxe5#
      • 1...Sa3
        • 2.Qxe5#
      • 1...Se3
        • 2.Qxe5#
      • 1...Sa5
        • 2.Qxe5#
      • 1...Sb6
        • 2.Qxe5#
      • 1...Sd6
        • 2.Qxe5#

Anticipated by 119841(1905)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • Q(e);CHECK,N_GUARD::S(G),XQ(e)
    • Q(e);N_GUARD::S(G)
    • Q(e);N_GUARD,P_PINR(F)::S(G)
    • R(c);SBLOCK,XP(E)::QAB(H)+R(F),DCHECK
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
    • Try
      • R(F);CHECK
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINQ(e)::QAB1(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT,XP(E)
  • Actual
    • Q(H);P_PINQ(e)
    • Vars
      • K(d);S_FLIGHT,XP(E)::S(G)
      • K(d);N_SPINQ(e),OGATEB,S_FLIGHT,XR(F)::QAB(H)
      • Q(e);N_SPINQ(e),XQ(H)::S(G)
      • R(c);SBLOCK,XP(E)::R1(F)
      • S(b);N_GUARD,XP(A)::QAR1(H),XQ(e)
      • Q(e);P_PINR(F)::S(G)
      • S(b);N_GUARD::QAR1(H),XQ(e)
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