MESON Chess Problem Database

Problem Display
PID: 37733 (4Bn2/2br1r2/p7/1k3qR1/pNNQ4/P7/8/1R1K2B1 w - - 0 1)

Yacoubian, Garen

Tages-Anzeiger, 1975

4Bn2/2br1r2/p7/1k3qR1/pNNQ4/P7/8/1R1K2B1

#2

9 + 8

3690 Kunstschach in der Schweiz 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qd5
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Ba5
      • 2.Sd6#
    • 1...Be5
      • 2.Qd5#
  • Tries
    • 1.Sd5+?
      • 1...Kc6
        • 2.Qc5#
      • 1...Qxb1+!
    • 1.Sd6+?
      • 1...Ka5
        • 2.Sc6#
      • 1...Bxd6!
    • 1.Rxf5+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Qd5#
      • 1...Rxf5!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sbc6#
      • 1...Kxa5
        • 2.Sc6#
      • 1...Bxa5
        • 2.Qd3#
      • 1...Be5
        • 2.Qd5#
      • 1...Bd6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATE::R1(H),XQ(c)
    • B(e);N_GUARD,SBLOCK::S(F)
    • B(e);N_SPINQ(c),S_CUTQ(c)::QAR2(G)
  • Tries
    • Try
      • S(E);CHECK,N_PINQ(c),N_SPINQ(G)
      • Vars
        • K(b);S_FLIGHT::QAR1(G)
      • Refutation
        • Q(c);CHECK,XR(A)
    • Try
      • S(F);CHECK,N_SPINQ(G)
      • Vars
        • K(b);N_SPINR(f),P-FLIGHT::S(E)
      • Refutation
        • B(e);XS(F)
    • Try
      • R(H);CHECK,XQ(c)
      • Refutation
        • R(g);XR(H)
  • Actual
    • S(F);
    • Threat
      • R(A)+S(E)
    • Vars
      • K(b);N_SPINR(f),P-FLIGHT,XS(F)::S(E)
      • B(e);SBLOCK,XS(F)::QAB(G)
      • B(e);N_SPINQ(c),S_CUTQ(c)::QAR2(G)
      • B(e);N_PINQ(G)::QAR1(G)
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