MESON Chess Problem Database

Problem Display
PID: 160139 (3R4/3N1n2/5B2/2Rpr2p/4N3/3kP1nr/K2b1P2/3Q4 w - - 0 1)

Juricek, Stanislav

British Chess Magazine, 2003

3R4/3N1n2/5B2/2Rpr2p/4N3/3kP1nr/K2b1P2/3Q4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Rc3#
    • 1...Se2
      • 2.Qc2#
      • 2.Qb1#
    • 1...Sxe4
      • 2.Qf1#
    • 1...dxe4
      • 2.Sxe5#
  • Tries
    • 1.Sxg3?
      • threat
        • 2.Qc2#
        • 2.Qe2#
        • 2.Qb1#
        • 2.Qf1#
      • 1...Rxe3
        • 2.Rc3#
        • 2.Qc2#
        • 2.Qb1#
      • 1...Rh1
        • 2.Qc2#
        • 2.Qe2#
      • 1...Rxg3!
    • 1.Sxe5+?
      • 1...Kxe4
        • 2.Qc2#
        • 2.Qf3#
        • 2.Qb1#
      • 1...Sxe5!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Rd4#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Rxe4
        • 2.Rc3#
      • 1...Sxe4
        • 2.Qf1#
      • 1...dxc4
        • 2.Sdc5#
      • 1...dxe4
        • 2.Sxe5#
      • 1...d4
        • 2.Rxd4#
      • 1...Se2
        • 2.Qc2#
      • 1...Sf5
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK,XS(E)::R1(F)
    • S(c);N_GUARD,SBLOCK,XS(E)::QAB(A)
    • P(e);SBLOCK,XS(E)::R(I)+S(H),DCHECK,XR(f)
  • Tries
    • Try
      • S(E);XS(c)
      • Threat
        • DUALS(4)
      • Refutation
        • R(d);XS(E)
    • Try
      • S(H);CHECK,P_PINP(e),XR(f)
      • Refutation
        • S(h);XS(H)
  • Actual
    • R(F);
    • Threat
      • R1(F)
    • Vars
      • K(b);N_SPINB(a),S_FLIGHT,XR(F)::QAB1(A)
      • R(f);SBLOCK,XS(E)::R1(F)
      • S(c);N_GUARD,XS(E)::QAB(A)
      • P(e);SBLOCK,XR(F)::R(I)+S(H),DCHECK
      • P(e);XS(E)::R(I)+S(H),DCHECK,XR(f)
      • P(e);::R1(F),XP(e)
      • S(c);SBLOCK::QAB1(A)
      • S(c);N_GUARD::QAB(A)
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