MESON Chess Problem Database

Problem Display
PID: 96272 (8/4Q3/2pB3r/2K1PpNn/1R6/2p1k1p1/p1R5/4N3 w - - 0 1)

Barnes, Barry Peter

US Problem Bulletin, 1963

8/4Q3/2pB3r/2K1PpNn/1R6/2p1k1p1/p1R5/4N3

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.exd6#
    • 1...Rf6
      • 2.exf6#
    • 1...Sf6
      • 2.exf6#
    • 1...f4
      • 2.Re4#
  • Tries
    • 1.Kb6?
      • threat
        • 2.Bc5#
      • 1...Rxd6
        • 2.exd6#
      • 1...c5!
    • 1.Rd4?
      • threat
        • 2.Sg2#
      • 1...g2
        • 2.Sxg2#
      • 1...Sf4!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Sg2#
      • 1...Kf4
        • 2.Kd3#
      • 1...Sf4
        • 2.Bc5#
      • 1...g2
        • 2.Sxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(h);OGATE,XB(G)::QAR(H)+P(E),XR(h)
    • R(h);OGATE::QAR(H)+P(E),XR(h)
    • S(f);OGATE::QAR(H)+P(E),XS(f)
    • P(e);N_GUARD::R1(C)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • B(G)
      • Vars
        • R(h);OGATE,XB(G)::QAR(H)+P(E),XR(h)
      • Refutation
        • P(g);P_PINB(G)
    • Try
      • R(C);
      • Threat
        • S(A)
      • Vars
        • P(d);::S(A),XP(d)
      • Refutation
        • S(f);
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • S(A)
    • Vars
      • K(c);S_FLIGHT::R(C)+K(D)
      • S(f);SBLOCK::B(G)
      • P(d);::S(A),XP(d)
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