MESON Chess Problem Database

Problem Display
PID: 120742 (1n3bR1/3PkN1K/n3p2p/2N4B/4PQP1/B2r4/8/3R4 w - - 0 1)

Svrcek, Milan

Pat a Mat, 1987

1n3bR1/3PkN1K/n3p2p/2N4B/4PQP1/B2r4/8/3R4

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.d8Q#
    • 1...Rb3
      • 2.d8Q#
    • 1...Rc3
      • 2.d8Q#
    • 1...Re3
      • 2.d8Q#
    • 1...Rf3
      • 2.d8Q#
    • 1...Rg3
      • 2.d8Q#
    • 1...Rh3
      • 2.d8Q#
    • 1...Bg7
      • 2.Re8#
    • 1...e5
      • 2.Qxe5#
  • Tries
    • 1.Sxd3+?
      • 1...Sb4
        • 2.d8Q#
      • 1...Sc5
        • 2.d8Q#
      • 1...Kxd7!
    • 1.Sxa6+?
      • 1...Rxa3
        • 2.d8Q#
      • 1...Rd6
        • 2.d8Q#
      • 1...Kxd7!
    • 1.Qd6+?
      • 1...Kf6
        • 2.Qxe6#
        • 2.e5#
      • 1...Rxd6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxf8#
      • 1...Kd6
        • 2.Sxa6#
      • 1...Kd8
        • 2.Sxe6#
      • 1...Sxd7
        • 2.Sc6#
      • 1...Rf3
        • 2.d8Q#
        • 2.d8B#
      • 1...Bg7
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD,XB(B)::P=Q
    • R(a);N_GUARD::P=Q
    • B(g);OGATE::R1(K)
    • P(c);OGATEB::QAR2(D),XP(c)
  • Tries
    • Try
      • S(F);CHECK,XR(a)
      • Vars
        • S(b);P_SPINS(b)::P=Q
      • Refutation
        • K(e);P-FLIGHT,XP(H)
    • Try
      • S(F);CHECK,XS(b)
      • Vars
        • R(a);XB(B)::P=Q
        • R(a);P_SPINR(a)::P=Q
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(a),XP(H)
    • Try
      • Q(D);CHECK
      • Refutation
        • R(a);XQ(D)
  • Actual
    • S(I);
    • Threat
      • QAB1(D),XB(g)
    • Vars
      • K(e);P_SPINR(a),S_FLIGHT::B(B)+S(F),XS(b)
      • K(e);P_SPINB(g),S_FLIGHT::S(F),XP(c)
      • S(f);N_GUARD,XP(H)::S(I)
      • R(a);N_GUARD::P=Q
      • B(g);::S(I)
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