MESON Chess Problem Database

Problem Display
PID: 207098 (8/B1Q2n1B/3r3P/R1P1kN2/7K/8/3P1N2/8 w - - 0 1)

Pongracz, Arnold

HM., Schachzeitung, 1866

8/B1Q2n1B/3r3P/R1P1kN2/7K/8/3P1N2/8

#2

10 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qe7#
    • 1...Sg5
      • 2.Qxd6#
    • 1...Sxh6
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qxd6#
    • 1...Sh8
      • 2.Qxd6#
  • Tries
    • 1.Sg7?
      • 1...Kd4
        • 2.cxd6#
      • 1...Kd5
        • 2.cxd6#
      • 1...Kf6
        • 2.Sg4#
      • 1...Sxh6
        • 2.Qxd6#
      • 1...Sg5
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qxd6#
      • 1...Sh8
        • 2.Qxd6#
      • 1...Kf4!
    • 1.Qe7+?
      • 1...Kf4
        • 2.Qe3#
        • 2.Qe4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Re6!
    • 1.cxd6+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kf6
        • 2.Qe7#
      • 1...Kf4!
    • 1.c6+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kf6
        • 2.Qe7#
      • 1...Kf4!
  • Keys
    • 1.Sd4!
      • 1...Kxd4
        • 2.cxd6#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kd5
        • 2.cxd6#
      • 1...Kf6
        • 2.Sg4#
      • 1...Sxh6
        • 2.Qxd6#
      • 1...Sg5
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qxd6#
      • 1...Sh8
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINR(b),S_FLIGHT::QAB1(I)
    • S(c);N_GUARD::QAB1(I),XR(b)
    • S(c);N_GUARD,XP(G)::QAB1(I),XR(b)
  • Tries
    • Try
      • S(F);
      • Vars
        • K(a);N_SPINR(b),S_FLIGHT::B(H)+P(E),XR(b)
        • K(a);N_SPINR(b),P-FLIGHT::R(D)+P(E),XR(b)
        • K(a);N_SPINR(b),S_FLIGHT::S(B)
        • S(c);N_GUARD,XP(G)::QAB1(I),XR(b)
        • S(c);N_GUARD::QAB1(I),XR(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(I);CHECK,N_PINR(b)
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(I)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • P(E);CHECK,XR(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(I)
        • K(a);S_FLIGHT::QAB1(I)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);CHECK
      • Vars
        • K(a);N_SPINR(b),P-FLIGHT::QAR1(I)
        • K(a);N_SPINR(b),S_FLIGHT::QAB1(I)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(F);
    • Vars
      • K(a);N_SPINR(b),S_FLIGHT,XS(F)::B(H)+P(E),XR(b)
      • K(a);S_FLIGHT::S(B)
      • K(a);N_SPINR(b),P-FLIGHT::R(D)+P(E),XR(b)
      • K(a);N_SPINR(b),S_FLIGHT::S(B)
      • S(c);N_GUARD,XP(G)::QAB1(I),XR(b)
      • S(c);N_GUARD::QAB1(I),XR(b)
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