MESON Chess Problem Database

Problem Display
PID: 158325 (R5B1/4RNk1/6p1/2p2p2/5r2/2N5/1BKQ4/6b1 w - - 0 1)

Barnes, Barry Peter

British Chess Magazine, 2000

R5B1/4RNk1/6p1/2p2p2/5r2/2N5/1BKQ4/6b1

#2

8 + 6

2905 Pula Open Solving 2000
5926 Chess Solving Yearbook 2000 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Sd5#
    • 1...Rf2
      • 2.Sb1#
      • 2.Sd1#
      • 2.Sa2#
      • 2.Se2#
      • 2.Sa4#
      • 2.Se4#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Bh2
      • 2.Se4#
  • Tries
    • 1.Sd5+?
      • 1...Rd4
        • 2.Qh6#
      • 1...Bd4!
    • 1.Qxf4?
      • threat
        • 2.Qe5#
      • 1...Kf6
        • 2.Sd5#
        • 2.Qe5#
      • 1...g5
        • 2.Qxg5#
      • 1...Bh2
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Se2#
        • 2.Sa4#
        • 2.Se4#
        • 2.Sb5#
        • 2.Sd5#
      • 1...Bd4!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qh8#
      • 1...Rf2+
        • 2.Se2#
      • 1...Kf6
        • 2.Sd5#
      • 1...Bxh2
        • 2.Se4#
      • 1...g5
        • 2.Qh6#
      • 1...Rh4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(f);S_FLIGHT::B(A)+S(D),DCHECK
    • B(a);N_GUARD::B(A)+S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • R(b);OGATE,P_SPINR(b)::QAB1(C)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(C);XR(b)
      • Threat
        • QAB(C)
      • Vars
        • P(e);OGATEB::QAR2(C),XP(e)
      • Refutation
        • B(a);
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • R(b);CHECK,N_GUARD,S_CUTB(a)::B(A)+S(D)
      • K(f);S_FLIGHT::B(A)+S(D),DCHECK
      • B(a);N_GUARD,XQ(C)::B(A)+S(D)
      • P(e);::QAB1(C)
      • R(b);OGATE::QAB(C)
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