MESON Chess Problem Database

Problem Display
PID: 18898 (3K4/2Pp4/N5p1/pN1Pk1p1/Rp4P1/PPp2R2/1BP2P2/7Q w - - 0 1)

Barnes, Barry Peter

Comm., Die Schwalbe, 1959

3K4/2Pp4/N5p1/pN1Pk1p1/Rp4P1/PPp2R2/1BP2P2/7Q

#2

14 + 7

3147 Chess Problems: Introduction to an Art 1963
4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rf5#
    • 1...Kxd5
      • 2.Re3#
  • Tries
    • 1.Sxc3?
      • 1...Kd4
        • 2.Qh8#
      • 1...Kd6
        • 2.Qh2#
      • 1...bxa3
        • 2.Qh2#
      • 1...d6
        • 2.Qh8#
      • 1...bxc3!
    • 1.Sxb4?
      • threat
        • 2.Qe1#
      • 1...Ke4
        • 2.Rf5#
      • 1...axb4!
    • 1.Bxc3+?
      • 1...Ke4
        • 2.Rf5#
        • 2.Rf6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...Kxd5
        • 2.Re3#
        • 2.Rf6#
      • 1...bxc3!
    • 1.Re3+?
      • 1...Kf4
        • 2.Re4#
        • 2.Qf3#
        • 2.Qe4#
      • 1...Kf6!
  • Keys
    • 1.Rxc3!
      • threat
        • 2.Rc4#
      • 1...Kf4
        • 2.Rc4#
      • 1...Kf6
        • 2.Rf3#
      • 1...bxa3
        • 2.Re3#
      • 1...bxc3
        • 2.Bxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(d);N_SPINP(a),P-FLIGHT,P_SPINP(b)::QAB(A)+R(G)
    • K(d);N_SPINP(a),P-FLIGHT,XP(K)::QAB(A)+R(G)
  • Tries
    • Try
      • S(J);XP(a)
      • Vars
        • K(d);P_SPINP(b),S_FLIGHT::QAB(A)
        • K(d);S_FLIGHT::QAB(A)
        • P(b);XP(E)::QAB(A)
        • P(g);SBLOCK::QAB(A)
      • Refutation
        • P(b);P_SPINP(b),XS(J)
    • Try
      • S(L);XP(b)
      • Threat
        • QAR(A)
      • Vars
        • K(d);N_SPINP(a),P-FLIGHT::QAB(A)+R(G)
      • Refutation
        • P(c);XS(L)
    • Try
      • B(B);CHECK,XP(a)
      • Refutation
        • P(b);XB(B)
    • Try
      • R(G);CHECK
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(G);XP(a)
    • Threat
      • B(B)+R(G)
    • Vars
      • K(d);P_SPINP(b),S_FLIGHT::R(G)
      • K(d);S_FLIGHT::B(B)+R(G),DCHECK
      • P(b);XP(E)::B(B)+R(G),DCHECK
      • P(b);OGATE,P_SPINP(b),XR(G)::B(B),XP(b)
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