MESON Chess Problem Database

Problem Display
PID: 227308 (1b2Q2q/3p4/2P1p1n1/4kpP1/NBpN1p2/3n1B2/5P2/K2R4 w - - 0 1)

Beugelsdijk, Ruud R A

Probleemblad, 1981

1b2Q2q/3p4/2P1p1n1/4kpP1/NBpN1p2/3n1B2/5P2/K2R4

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Bc3#
    • 1...Sh4
      • 2.Qxh8#
    • 1...Se7
      • 2.Qxh8#
    • 1...dxc6
      • 2.Sxc6#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Bc3#
      • 1...Sxb4
        • 2.Re1#
      • 1...Ba7
        • 2.Bd6#
      • 1...c3
        • 2.Bxc3#
      • 1...d5!
    • 1.Bc3?
      • threat
        • 2.Sb5#
      • 1...Kd6
        • 2.Sb5#
      • 1...d5
        • 2.Qxe6#
      • 1...Ba7!
    • 1.Re1+?
      • 1...Kxd4
        • 2.Bc3#
      • 1...Sxe1!
    • 1.Qxe6+?
      • 1...Kxd4
        • 2.Bc3#
        • 2.Bc5#
        • 2.Qd5#
      • 1...dxe6!
    • 1.Qxb8+?
      • 1...Kxd4
        • 2.Bc3#
        • 2.Bc5#
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
      • 1...Qxb8!
  • Keys
    • 1.cxd7!
      • threat
        • 2.Sc6#
      • 1...Kxd4
        • 2.Bc3#
      • 1...Sxb4
        • 2.Qxe6#
      • 1...Se7
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(d);N_SPINP(f),OGATEB,P_SPINS(a),S_FLIGHT,XS(G)::B(F)
    • S(g);N_GUARD::QAB(J),XQ(j)
    • S(g);N_GUARD,N_SPINP(f)::QAB(J),XQ(j)
    • P(h);XP(I)::S(G),XP(h)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(F)
      • Vars
        • S(a);N_GUARD,XB(F)::R(B)
        • B(i);N_GUARD::B(F)
        • P(b);::B(F),XP(b)
      • Refutation
        • P(h);
    • Try
      • B(F);
      • Threat
        • B(F)+S(G)
      • Vars
        • K(d);N_SPINP(f),S_FLIGHT::S(G)
        • P(h);N_GUARD::QAR1(J),XP(f)
      • Refutation
        • B(i);
    • Try
      • R(B);CHECK
      • Vars
        • K(d);N_SPINP(f),S_FLIGHT,XS(G)::B(F)
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(J);CHECK,XP(f)
      • Refutation
        • P(h);XQ(J)
    • Try
      • Q(J);CHECK,N_PINP(f),XB(i)
      • Vars
        • P(h);P_SPINP(h)::QAB1(J),XP(h)
      • Refutation
        • Q(j);XQ(J)
  • Actual
    • P(I);XP(h)
    • Threat
      • S(G)
    • Vars
      • K(d);N_SPINP(f),OGATEB,P_SPINS(a),S_FLIGHT,XS(G)::B(F)
      • S(a);XB(F)::QAR1(J),XP(f)
      • S(g);N_GUARD,N_SPINP(f)::QAB(J),XQ(j)
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