MESON Chess Problem Database

Problem Display
PID: 205566 (8/8/8/6Q1/3kp3/4R3/2K5/8 w - - 0 1)

Lazard, Frederic

La Strategie, 1925

8/8/8/6Q1/3kp3/4R3/2K5/8

#2

3 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Rxe4#
  • Tries
    • 1.Re1?
      • 1...Kc4
        • 2.Rxe4#
      • 1...e3!
    • 1.Re2?
      • 1...Kc4
        • 2.Rxe4#
      • 1...e3!
    • 1.Rg3?
      • 1...e3
        • 2.Rg4#
      • 1...Kc4!
    • 1.Rh3?
      • 1...e3
        • 2.Rh4#
      • 1...Kc4!
    • 1.Qa5?
      • 1...Kc4
        • 2.Rxe4#
      • 1...Kxe3!
    • 1.Qf5?
      • threat
        • 2.Rxe4#
      • 1...Kc4
        • 2.Rxe4#
      • 1...Kxe3!
    • 1.Qh5?
      • 1...Kc4
        • 2.Rxe4#
      • 1...Kxe3!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Ra4#
      • 1...Kc4
        • 2.Ra4#

FEATURES

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