MESON Chess Problem Database

Problem Display
PID: 183405 (8/b4p2/3Q4/1N3pR1/1Pr1k3/2r1p1R1/B1b5/4K2N w - - 0 1)

Belleli, Alexander

British Chess Magazine, 1940

8/b4p2/3Q4/1N3pR1/1Pr1k3/2r1p1R1/B1b5/4K2N

#2

8 + 8

56 The Problemist 1943

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Sxc3#
    • 1...Rc5
      • 2.Qd4#
    • 1...f4
      • 2.Re5#
      • 2.Qd5#
  • Tries
    • 1.R3g4+?
      • 1...Kf3
        • 2.Qg3#
      • 1...f4
        • 2.Rxf4#
        • 2.Qd5#
      • 1...fxg4!
    • 1.R5g4+?
      • 1...f4
        • 2.Rxf4#
      • 1...fxg4!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Sf2#
      • 1...Kxe5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxf5#
      • 1...Kd3
        • 2.Sf2#
      • 1...Kf4
        • 2.R5g4#
      • 1...Kd5
        • 2.Sxc3#
      • 1...Rc5
        • 2.Qd4#
      • 1...f4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD,XP(E)::S(F),XR(b)
    • R(d);N_GUARD,S_CUTB(g)::QAR1(H)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(H)
      • Refutation
        • P(f);XR(D)
    • Try
      • R(G);CHECK
      • Vars
        • P(f);P_SPINP(f)::R1(G),XP(f)
      • Refutation
        • P(f);XR(G)
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);P_SPINP(c),S_FLIGHT::S(B)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(f),XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H),XP(f)
    • Vars
      • K(e);P_SPINP(c),S_FLIGHT::S(B)
      • K(e);P-FLIGHT,P_SPINP(f)::R1(G)
      • K(e);P_SPINP(f),P_SPINR(d),S_FLIGHT::S(F),XR(b)
      • R(d);N_GUARD,S_CUTB(g)::QAR1(H)
      • P(f);::QAB1(H)
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