MESON Chess Problem Database

Problem Display
PID: 164027 (B7/b1p5/8/8/4R3/7p/5pRr/3Q1K1k w - - 0 1)

Matthaus, Hans Georg

stern, 1997

(First published on Thu Feb 13 1997)

B7/b1p5/8/8/4R3/7p/5pRr/3Q1K1k

#2

5 + 6

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bb8
      • 2.Kxf2#
    • 1...c5
      • 2.Kxf2#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Kxf2#
        • 2.Rg1#
      • 1...hxg2+
        • 2.Kxf2#
      • 1...Bxd4
        • 2.Rg1#
      • 1...c6
        • 2.Kxf2#
      • 1...Rxg2!
    • 1.Rh4?
      • threat
        • 2.Rg1#
      • 1...hxg2+
        • 2.Bxg2#
      • 1...Rxg2
        • 2.Rxh3#
      • 1...c6!
  • Keys
    • 1.Re3!
      • threat
        • 2.Kxf2#
        • 2.Rg1#
      • 1...hxg2+
        • 2.Kxf2#
      • 1...Rxg2
        • 2.Rxh3#
      • 1...Bxe3
        • 2.Rg1#
      • 1...c6
        • 2.Kxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(e);::QAR(A)+K(B),XP(b)
    • P(f);::QAR(A)+K(B),XP(b)
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);CHECK,P_SPINP(d),XR(C)::QAR(A)+K(B),XP(b)
        • B(e);XR(D)::B(E)+R(C),DCHECK
        • P(f);::QAR(A)+K(B),XP(b)
      • Refutation
        • R(c);P_SPINR(c),XR(C)
    • Try
      • R(D);
      • Threat
        • B(E)+R(C),DCHECK
      • Vars
        • P(d);CHECK,OGATE,P_SPINP(d),P_SPINR(c),XR(C)::B(E),XP(d)
        • R(c);OGATEB,P_SPINP(d),P_SPINR(c),XR(C)::R(D),XP(d)
      • Refutation
        • P(f);
  • Actual
    • R(D);
    • Threat
      • DUALS(2)
    • Vars
      • P(d);CHECK,P_SPINP(d),XR(C)::QAR(A)+K(B),XP(b)
      • R(c);OGATEB,P_SPINR(c),XR(C)::R(D),XP(d)
      • B(e);XR(D)::B(E)+R(C),DCHECK
      • P(f);::QAR(A)+K(B),XP(b)
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