MESON Chess Problem Database

Problem Display
PID: 242011 (8/2p5/R1R5/2n5/2k5/K7/3Q4/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1935

8/2p5/R1R5/2n5/2k5/K7/3Q4/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qb4#
  • Tries
    • 1.Qb4+?
      • 1...Kd5
        • 2.Rxc5#
      • 1...Kd3!
    • 1.Qd1?
      • 1...Kc3
        • 2.Rxc5#
      • 1...Kb5!
    • 1.Qd4+?
      • 1...Kb5
        • 2.Qxc5#
        • 2.Qb4#
      • 1...Kxd4!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Rxc5#
      • 1...Kb5
        • 2.Qxc5#
      • 1...Kxd5!
    • 1.Qd6?
      • threat
        • 2.Rxc5#
      • 1...Kc3
        • 2.Rxc5#
      • 1...Kb5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...cxd6!
    • 1.Qd7?
      • 1...Kc3
        • 2.Rxc5#
      • 1...Kb5!
    • 1.Qd8?
      • 1...Kc3
        • 2.Rxc5#
      • 1...Kb5!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Rxc5#
      • 1...Kb5
        • 2.Qxc5#
      • 1...Kd5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINS(b),S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT::R1(D),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::R(D),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D),XS(b)
        • K(a);S_FLIGHT::QAR1(A),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • R1(D),XS(b)
      • Vars
        • K(a);P-FLIGHT::R(D),XS(b)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::R(D),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::R(D),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • R1(D),XS(b)
    • Vars
      • K(a);N_SPINS(b),S_FLIGHT::QAR1(A),XS(b)
      • K(a);N_SPINS(b),S_FLIGHT::R1(D),XS(b)
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