MESON Chess Problem Database

Problem Display
PID: 971 (rk6/p1p5/B4p2/2Kp4/R2rp3/1P6/1QP5/8 w - - 0 1)

Emmerson, Stephen

The Problemist Supplement, 1995

rk6/p1p5/B4p2/2Kp4/R2rp3/1P6/1QP5/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Rb4#
    • 1...Rd2
      • 2.Rb4#
    • 1...Rd3
      • 2.Rb4#
    • 1...Rxa4
      • 2.bxa4#
    • 1...Rb4
      • 2.Rxb4#
    • 1...Rc4+
      • 2.bxc4#
  • Keys
    • 1.c4!
      • threat
        • 2.Rb4#
      • 1...Rxc4+
        • 2.bxc4#
      • 1...c6
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::R(D)
    • R(a);OGATE,XR(D)::QAR(A)+P(C),XR(a)
    • R(a);N_GUARD::R(D),XR(a)
    • R(a);CHECK,OGATE::QAR(A)+P(C),XR(a)
  • Actual
    • P(B);
    • Threat
      • R(D)
    • Vars
      • R(a);CHECK,OGATE,XP(B)::QAR(A)+P(C),XR(a)
      • P(f);OGATEB::QAB(A)
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