MESON Chess Problem Database

Problem Display
PID: 205538 (8/1p6/1Kp5/8/2k5/2PR4/8/1Q6 w - - 0 1)

Schonberger, Tibor

L'Echiquier Marseillais, 1925

8/1p6/1Kp5/8/2k5/2PR4/8/1Q6

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qb5#
  • Tries
    • 1.Kxb7?
      • 1...Kc5
        • 2.Qb4#
      • 1...c5!
    • 1.Qb2?
      • threat
        • 2.Rd4#
      • 1...c5
        • 2.Qb5#
      • 1...Kxd3!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qa2#
      • 1...Kd5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(c)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAB(A)
    • Vars
      • K(a);S_FLIGHT::QAR2(A)
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