MESON Chess Problem Database

Problem Display
PID: 107583 (1r6/2QP2p1/8/3p2P1/P2kN1Bp/Pp1P4/2p2N2/b1B3K1 w - - 0 1)

Apro, Laszlo

Rokada, 1975

1r6/2QP2p1/8/3p2P1/P2kN1Bp/Pp1P4/2p2N2/b1B3K1

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Qxc3#
    • 1...b2
      • 2.Qc3#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Se2#
      • 1...Re8
        • 2.Sb5#
      • 1...Bxc3!
    • 1.Sg3?
      • threat
        • 2.Se2#
        • 2.Sf5#
      • 1...Re8
        • 2.Sf5#
      • 1...Rf8
        • 2.Se2#
      • 1...g6
        • 2.Se2#
      • 1...hxg3!
    • 1.Sc5?
      • threat
        • 2.Se6#
      • 1...Kc3
        • 2.Se6#
      • 1...Re8
        • 2.Sxb3#
      • 1...Rb6!
    • 1.Sd6?
      • threat
        • 2.Sf5#
      • 1...Ke5
        • 2.Sb5#
      • 1...Rf8
        • 2.Sb5#
      • 1...g6!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sf3#
      • 1...Ke3
        • 2.Sxb3#
      • 1...Rf8
        • 2.Sxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB1(J),XB(a)
    • P(c);S_CUTB(a)::QAB1(J)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • R(h);N_GUARD::S(G)
      • Refutation
        • B(a);XS(G)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::S(G)
        • P(g);::S(G)
      • Refutation
        • P(e);XS(G)
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • K(d);S_FLIGHT::QAR(J)+S(G)
        • R(h);N_GUARD::S(G),XP(c)
      • Refutation
        • R(h);
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • K(d);S_FLIGHT::QAB(J)+S(G)
        • R(h);N_GUARD::S(G)
      • Refutation
        • P(g);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);S_FLIGHT::B(A)+S(G),XP(c)
      • R(h);N_GUARD::S(G),XP(c)
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