MESON Chess Problem Database

Problem Display
PID: 82013 (nB2R3/2N2P2/2pNpq2/2P1kp1R/3n1pP1/K1Q5/4b1r1/7B w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1980

nB2R3/2N2P2/2pNpq2/2P1kp1R/3n1pP1/K1Q5/4b1r1/7B

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Rxf5#
      • 2.Rxe6#
    • 1...Qg5
      • 2.Rxe6#
    • 1...Qg7
      • 2.Rxf5#
      • 2.Rxe6#
    • 1...Qd8
      • 2.Rxf5#
      • 2.Rxe6#
    • 1...Qh8
      • 2.Rxf5#
      • 2.Rxe6#
    • 1...Qh6
      • 2.Rxf5#
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Qxd4#
      • 1...Kd5
        • 2.Sxf4#
      • 1...Qxe6
        • 2.Rxf5#
      • 1...Rg3
        • 2.Sc4#
      • 1...Qe7!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Qxd4#
      • 1...Ke4
        • 2.Sd6#
      • 1...Qxf5
        • 2.Rxe6#
      • 1...Qd8
        • 2.Rxe6#
      • 1...Rg3
        • 2.Sxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD,N_SPINP(f),P_SPINP(h)::R1(K),XP(h)
    • Q(i);N_GUARD::R1(F),XP(f)
    • P(d);N_GUARD::QAR2(C)
  • Tries
    • Try
      • S(H);XP(h)
      • Threat
        • QAB1(C),XS(c)
      • Vars
        • K(e);N_SPINS(c),P-FLIGHT,P_SPINR(b)::S(H),XP(d)
        • Q(i);N_GUARD,P_SPINQ(i),XS(H)::R1(F),XP(f)
        • R(b);P_PINQ(C)::B(J)+S(G),DCHECK
      • Refutation
        • Q(i);
  • Actual
    • S(G);P_PINP(h),XP(f)
    • Threat
      • QAB1(C),XS(c)
    • Vars
      • K(e);N_SPINS(c),P-FLIGHT,P_SPINR(b)::S(G)
      • Q(i);N_GUARD,P_SPINQ(i),XS(G)::R1(K),XP(h)
      • Q(i);N_GUARD::R1(K),XP(h)
      • R(b);P_PINQ(C)::B(J)+S(H),XS(j)
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