MESON Chess Problem Database

Problem Display
PID: 15632 (1b1rR3/2p2p2/R3Pp2/1n1k1p2/2N5/1B1P1P1K/5B2/n1Q5 w - - 0 1)

Bakcsi, Gyorgy

1/2 Prize, Revista Romana de Sah, 1986

1b1rR3/2p2p2/R3Pp2/1n1k1p2/2N5/1B1P1P1K/5B2/n1Q5

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Rxd8#
    • 1...Sc3
      • 2.Rxd8#
    • 1...Sa7
      • 2.Rxd8#
  • Tries
    • 1.Sb2+?
      • 1...Ke5
        • 2.Qe3#
        • 2.f4#
      • 1...Sxb3!
    • 1.Sa3+?
      • 1...Ke5
        • 2.Qe3#
        • 2.f4#
      • 1...Sxb3!
    • 1.Sa5+?
      • 1...Ke5
        • 2.Qe3#
        • 2.f4#
      • 1...Sxb3!
    • 1.Se5+?
      • 1...Kxe5
        • 2.Qe3#
        • 2.f4#
      • 1...Sxb3!
    • 1.Sb6+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Ke5!
    • 1.Sd6+?
      • 1...Ke5
        • 2.Sxf7#
        • 2.Qe3#
        • 2.f4#
      • 1...Sxb3!
    • 1.Qf4?
      • threat
        • 2.Qxf5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sd6
        • 2.Qd4#
      • 1...c5
        • 2.Se3#
      • 1...c6
        • 2.Sb6#
      • 1...fxe6!
    • 1.Qxa1?
      • threat
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sd6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rd6
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sxd6#
      • 1...Sa3
        • 2.Sxa3#
        • 2.Rxd8#
        • 2.Qd4#
      • 1...Sc3
        • 2.Rxd8#
      • 1...Sd6
        • 2.Sxd6#
        • 2.Qd4#
      • 1...c5
        • 2.Se3#
      • 1...c6!
    • 1.Qc3?
      • threat
        • 2.Se3#
      • 1...Sxc3
        • 2.Rxd8#
      • 1...Sd4
        • 2.Qxd4#
      • 1...c6!
  • Keys
    • 1.f4!
      • threat
        • 2.Qh1#
      • 1...Sd4
        • 2.Se3#
      • 1...Sd6
        • 2.Sb6#
      • 1...Sc3
        • 2.Rxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::R(J),XR(i)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XB(C)
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XB(C)
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XB(C)
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XB(C)
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XB(C)
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XP(d)
      • Vars
        • S(b);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::QAR1(A)
        • P(f);SBLOCK::B(C)+S(G),DCHECK
      • Refutation
        • P(g);XP(I)
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(5)
      • Vars
        • S(b);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::R(J),XR(i)
        • P(f);SBLOCK::B(C)+S(G),DCHECK
      • Refutation
        • P(f);
    • Try
      • Q(A);
      • Threat
        • B(C)+S(G),DCHECK
      • Vars
        • S(b);N_GUARD,XQ(A)::R(J),XR(i)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • P(f);
  • Actual
    • P(E);
    • Threat
      • QAB(A)
    • Vars
      • S(b);SBLOCK::B(C)+S(G),DCHECK
      • S(b);N_GUARD::R(J),XR(i)
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