MESON Chess Problem Database

Problem Display
PID: 96643 (3r3b/5Q2/4nqp1/2P5/R2PkpP1/3NnN2/1PPB1PP1/1BK1R3 w - - 0 1)

Prins, Hendrik

Rosner, Eugene David

US Problem Bulletin, 1989

3r3b/5Q2/4nqp1/2P5/R2PkpP1/3NnN2/1PPB1PP1/1BK1R3

#2

15 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qb7#
    • 1...Rxd4
      • 2.Qb7#
    • 1...Ra8
      • 2.Qb7#
    • 1...Re8
      • 2.Qb7#
    • 1...Rf8
      • 2.Qb7#
    • 1...Rg8
      • 2.Qb7#
    • 1...Sxc5
      • 2.Sxc5#
  • Tries
    • 1.Sde5?
      • threat
        • 2.c4#
      • 1...Kd5
        • 2.Qb7#
      • 1...Rxd4
        • 2.Qb7#
      • 1...Sxd4
        • 2.c3#
      • 1...Sxc5!
    • 1.Rxe3+?
      • 1...Kd5
        • 2.Qb7#
      • 1...fxe3!
    • 1.Qxe6+?
      • 1...Qe5
        • 2.Sg5#
        • 2.d5#
      • 1...Qxe6!
  • Keys
    • 1.c3!
      • threat
        • 2.Sb4#
      • 1...Kd5
        • 2.Qb7#
      • 1...Qxd4
        • 2.Sxf4#
      • 1...Rxd4
        • 2.Qb7#
      • 1...Sxd4
        • 2.Sde5#
      • 1...Sxc5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(b);N_SPINS(a),P_SPINS(d),S_FLIGHT::QAB(O)
    • R(g);N_GUARD,P_SPINR(g),XP(L)::QAB(O)
    • R(g);N_GUARD::QAB(O)
    • S(d);XP(N)::S(I),XS(d)
  • Tries
    • Try
      • S(I);
      • Threat
        • B(A)+P(E)
      • Vars
        • K(b);N_SPINS(a),P_SPINS(d),S_FLIGHT::QAB(O)
        • R(g);N_GUARD,P_SPINR(g),XP(L)::QAB(O)
        • S(d);XP(L)::B(A)+P(E)
      • Refutation
        • S(d);XP(N)
    • Try
      • R(C);CHECK,XS(a)
      • Vars
        • K(b);P_SPINS(d),S_FLIGHT::QAB(O)
      • Refutation
        • P(c);XR(C)
    • Try
      • Q(O);CHECK,XS(d)
      • Refutation
        • Q(e);XQ(O)
  • Actual
    • P(E);
    • Threat
      • B(A)+S(I)
    • Vars
      • K(b);N_SPINS(a),P_SPINS(d),S_FLIGHT::QAB(O)
      • Q(e);P_SPINQ(e),XP(L)::B(A)+S(I),XP(c)
      • R(g);N_GUARD,P_SPINR(g),XP(L)::QAB(O)
      • S(d);XP(L)::B(A)+S(I)
      • S(d);XP(N)::B(A)+S(I),DCHECK,XS(d)
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