MESON Chess Problem Database

Problem Display
PID: 231537 (8/8/4p3/2Q2p1R/4k3/N7/5K2/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1927

8/8/4p3/2Q2p1R/4k3/N7/5K2/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qe3#
    • 1...Kf4
      • 2.Qd4#
    • 1...f4
      • 2.Qc4#
    • 1...e5
      • 2.Qc4#
  • Tries
    • 1.Ke2?
      • 1...f4
        • 2.Re5#
        • 2.Qb4#
        • 2.Qc4#
        • 2.Qe5#
      • 1...e5
        • 2.Qc4#
      • 1...Kf4!
    • 1.Sb1?
      • 1...Kf4
        • 2.Qd4#
      • 1...f4
        • 2.Qc4#
      • 1...e5
        • 2.Qc4#
      • 1...Kd3!
    • 1.Sc2?
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...e5
        • 2.Qc4#
      • 1...Kd3!
    • 1.Sb5?
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...e5
        • 2.Qc4#
      • 1...Kd3!
    • 1.Rh4+?
      • 1...Kd3
        • 2.Rd4#
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qc2#
      • 1...f4!
    • 1.Qd6?
      • 1...f4
        • 2.Re5#
      • 1...e5!
    • 1.Qc3?
      • 1...Kf4
        • 2.Qd4#
      • 1...f4
        • 2.Re5#
        • 2.Qc4#
      • 1...e5
        • 2.Qc4#
      • 1...Kd5!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Qe3#
      • 1...Kxe5!
  • Keys
    • 1.Rg5!
      • 1...Kd3
        • 2.Qe3#
      • 1...Kf4
        • 2.Qe3#
      • 1...f4
        • 2.Qc4#
      • 1...e5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(C)
    • K(a);P-FLIGHT::QAR2(C)
    • P(b);SBLOCK::QAR2(C)
    • P(c);SBLOCK::QAR2(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(b);SBLOCK::QAR2(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(C);
      • Vars
        • P(b);OGATE,SBLOCK::R1(D)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XQ(C)
  • Actual
    • R(D);
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
      • P(b);SBLOCK::QAR2(C)
      • P(c);SBLOCK::QAR2(C)
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