MESON Chess Problem Database

Problem Display
PID: 90570 (1b4Br/n1P3B1/K2RQr1p/8/N7/N7/2P2pp1/k4b1R w - - 0 1)

Barnes, Barry Peter

Die Schwalbe, 1961

1b4Br/n1P3B1/K2RQr1p/8/N7/N7/2P2pp1/k4b1R

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sb5?
      • threat
        • 2.Rd1#
        • 2.Qa2#
      • 1...Rxg8
        • 2.Rd1#
      • 1...Kb1!
    • 1.Rd3?
      • threat
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Rxg8
        • 2.Bxf6#
      • 1...Sb5
        • 2.Rd1#
      • 1...Sc6
        • 2.Qa2#
      • 1...Bxc7!
    • 1.Qe2?
      • threat
        • 2.Bxf6#
      • 1...Sb5
        • 2.Qd1#
      • 1...Sc6
        • 2.Rd1#
      • 1...Rxg8!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Bxf6#
      • 1...Sb5
        • 2.Qa2#
      • 1...Sc6
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = WHITE_IN_CHECK
  • Tries
    • Try
      • S(C);P_SPINS(C)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);XB(J)::R(F)
      • Refutation
        • K(a);N_SPINR(e),P-FLIGHT
    • Try
      • R(F);P_SPINQ(G),P_SPINR(F)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);XB(J)::B(I),XR(e)
        • S(g);N_PINR(F)::R(F)
        • S(g);N_PINQ(G)::QAR1(G)
      • Refutation
        • B(h);XP(H)
    • Try
      • Q(G);P_SPINQ(G),P_SPINR(F)
      • Threat
        • B(I),XR(e)
      • Vars
        • S(g);N_PINQ(G)::QAR(G)
        • S(g);N_PINR(F)::R(F)
      • Refutation
        • R(i);XB(J)
  • Actual
    • Q(G);P_SPINQ(G),P_SPINR(F)
    • Threat
      • B(I),XR(e)
    • Vars
      • S(g);N_PINQ(G)::QAR1(G)
      • S(g);N_PINR(F)::R(F)
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