MESON Chess Problem Database

Problem Display
PID: 120637 (3R1R2/1p6/4p3/1N2k3/K3Nr1q/2P3P1/p3Q3/B1r5 w - - 0 1)

Krzeli, Ratislav

Canadian Chess Chat, 1982

3R1R2/1p6/4p3/1N2k3/K3Nr1q/2P3P1/p3Q3/B1r5

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.gxf4#
    • 1...Qh1
      • 2.gxf4#
    • 1...Qh3
      • 2.gxf4#
    • 1...Qh5
      • 2.gxf4#
    • 1...Qh7
      • 2.gxf4#
    • 1...Qh8
      • 2.gxf4#
    • 1...Rxc3
      • 2.Bxc3#
  • Tries
    • 1.c4+?
      • 1...Rc3
        • 2.Bxc3#
      • 1...Rxa1!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sc4#
        • 2.Qb5#
      • 1...Rxe4+
        • 2.Sc4#
      • 1...b5+
        • 2.Qxb5#
      • 1...Kd5
        • 2.Qb5#
      • 1...Qxd8
        • 2.Qb5#
      • 1...Rxc3
        • 2.Sc4#
      • 1...Rxf8
        • 2.Qb5#
      • 1...Qf6
        • 2.Qb5#
      • 1...Rb1
        • 2.Sc4#
      • 1...Rd1
        • 2.Sc4#
      • 1...Rf6
        • 2.Qb5#
      • 1...Rf7
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 6
  • Sets
    • Q(d);N_GUARD::P(D),XR(c)
    • R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
  • Tries
    • Try
      • P(C);CHECK,N_SPINS(F)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • R(a);XB(A)
  • Actual
    • S(G);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);CHECK,P_SPINR(c),XS(F)::S(G)
      • P(g);CHECK::QAR(B),XP(g)
      • K(e);P-FLIGHT::QAR2(B)
      • Q(d);XR(H)::QAR(B)
      • R(a);P_SPINR(a),XP(C)::S(G)
      • R(c);XR(I)::QAR(B)
      • Q(d);::QAR(B)
      • R(a);::S(G)
      • R(c);::QAR(B)
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