MESON Chess Problem Database

Problem Display
PID: 195096 (8/Q1p5/2P1p3/4k2N/1KP1N1P1/1p1rpP2/7b/3r4 w - - 0 1)

Petrovay, Istvan

Magyar Sakkvilag, 1918

8/Q1p5/2P1p3/4k2N/1KP1N1P1/1p1rpP2/7b/3r4

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sf7#
      • 1...Kd6
        • 2.Qc5#
      • 1...Rd7!
    • 1.Qa5+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Rd5!
    • 1.Qxc7+?
      • 1...Rd6
        • 2.Qg7#
      • 1...Kd4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Rxd6
        • 2.Qxe3#
      • 1...cxd6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • K(f);S_FLIGHT::QAB1(H)
      • Refutation
        • R(d);
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(H)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(H);CHECK,XP(h)
      • Vars
        • R(d);P_SPINR(d)::QAB(H)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(f);S_FLIGHT,XS(D)::QAB1(H)
      • R(d);N_GUARD,SBLOCK,XS(D)::QAR2(H),XP(e)
      • P(h);OGATE,SBLOCK,XS(D)::QAB(H)
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