MESON Chess Problem Database

Problem Display
PID: 42309 (bbN5/5rBB/p3ppQ1/3k3K/N1p1R3/8/2n5/1R6 w - - 0 1)

Barnes, Barry Peter

2nd HM., The Problemist, 1986

bbN5/5rBB/p3ppQ1/3k3K/N1p1R3/8/2n5/1R6

#2

8 + 9

4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qxe6#
  • Tries
    • 1.Sab6+?
      • 1...Kc5
        • 2.Rxc4#
      • 1...Kc6!
    • 1.Rxe6?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Rd1#
      • 1...Kxe6
        • 2.Qf5#
      • 1...f5
        • 2.Scb6#
      • 1...Be5!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.Qe4#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Qg5#
      • 1...Sd4
        • 2.Rc5#
      • 1...e5
        • 2.Qxf7#
      • 1...f5
        • 2.Sab6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(f);OGATE::QAB1(E),XP(e)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(C),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);XP(e)
      • Threat
        • QAB1(E)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(f)::R(A)
        • K(c);P_SPINP(f),S_FLIGHT,XR(C)::QAB1(E)
        • P(f);::S(H)
      • Refutation
        • B(i);
  • Actual
    • R(C);XP(b)
    • Threat
      • QAB1(E)
    • Vars
      • K(c);S_FLIGHT,XR(C)::QAB1(E)
      • K(c);P-FLIGHT,P_SPINP(f)::QAR2(E)
      • S(a);SBLOCK::R1(C)
      • P(e);OGATEB,SBLOCK::QAB(E),XR(g)
      • P(f);::S(B)
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