MESON Chess Problem Database

Problem Display
PID: 45389 (8/2b5/1B1pr2p/1P3p2/Q1NNkP2/1P1p3p/K2P2qP/5R1B w - - 0 1)

East, SH

4th HM., BCF 048. Ty., 1944-1945

8/2b5/1B1pr2p/1P3p2/Q1NNkP2/1P1p3p/K2P2qP/5R1B

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qa8#
  • Tries
    • 1.Sc2?
      • threat
        • 2.S4e3#
      • 1...Kd5
        • 2.Qa8#
      • 1...Bxb6
        • 2.Sxb6#
      • 1...d5
        • 2.Sd6#
      • 1...dxc2!
    • 1.Se2?
      • threat
        • 2.Sc3#
        • 2.Se3#
      • 1...Kd5
        • 2.Sc3#
        • 2.Qa8#
      • 1...Bxb6
        • 2.Sxb6#
      • 1...Qf3
        • 2.Se3#
        • 2.Bxf3#
      • 1...d5
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sd6#
      • 1...dxe2!
    • 1.Sc6?
      • threat
        • 2.Se3#
      • 1...Bxb6
        • 2.Sxb6#
      • 1...d5
        • 2.Sd6#
      • 1...Kd5!
    • 1.Sxe6?
      • threat
        • 2.Se3#
      • 1...Bxb6
        • 2.Sxb6#
      • 1...d5
        • 2.Sd6#
      • 1...Kd5!
    • 1.Re1+?
      • 1...Kd5
        • 2.Qa8#
      • 1...Kxf4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Se3#
      • 1...Qxd2+
        • 2.Sfxd2#
      • 1...Kxf4
        • 2.Sce5#
      • 1...Kd5
        • 2.Qa8#
      • 1...Bxb6
        • 2.Sxb6#
      • 1...Qg7
        • 2.Sg5#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAB(G)
  • Tries
    • Try
      • S(I);N_SPINP(D)
      • Threat
        • QAR(G)+S(H)
      • Vars
        • K(d);S_FLIGHT::QAB(G)
        • B(i);XB(L)::QAR(G)+S(H),XB(i)
        • P(f);SBLOCK::QAR(G)+S(H),DCHECK
      • Refutation
        • P(b);XS(I)
    • Try
      • S(I);N_SPINP(D)
      • Threat
        • DUALS(2)
      • Vars
        • B(i);XB(L)::QAR(G)+S(H),XB(i)
      • Refutation
        • P(b);XS(I)
    • Try
      • S(I);
      • Threat
        • QAR(G)+S(H)
      • Vars
        • B(i);XB(L)::QAR(G)+S(H),XB(i)
        • P(f);SBLOCK::QAR(G)+S(H),DCHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(I);XR(g)
      • Threat
        • QAR(G)+S(H)
      • Vars
        • B(i);XB(L)::QAR(G)+S(H),XB(i)
        • P(f);SBLOCK::QAR(G)+S(H),DCHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(G)
      • Refutation
        • K(d);N_SPINQ(a),P-FLIGHT,XP(J)
  • Actual
    • S(I);N_PINQ(a)
    • Threat
      • QAR(G)+S(H)
    • Vars
      • Q(a);CHECK,XP(D)::B(B)+S(I),DCHECK,XQ(a)
      • K(d);P-FLIGHT,XP(J)::QAR(G)+S(H)
      • K(d);S_FLIGHT::QAB(G)
      • B(i);XB(L)::QAR(G)+S(H),XB(i)
      • Q(a);N_PINP(D)::B(B)+S(I),DCHECK
      • P(f);SBLOCK::QAR(G)+S(H),DCHECK
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