MESON Chess Problem Database

Problem Display
PID: 250017 (4R3/Q1N5/1BPp3p/1P1pn3/2rPk3/1B6/2P5/3N1R1K w - - 0 1)

Rice, John Michael

Uralski Problemist, 2008

4R3/Q1N5/1BPp3p/1P1pn3/2rPk3/1B6/2P5/3N1R1K

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Bxc2#
    • 1...Rc3
      • 2.Bxd5#
    • 1...Ra4
      • 2.Bxd5#
    • 1...Rb4
      • 2.Bxd5#
    • 1...Rxc6
      • 2.Bxd5#
  • Tries
    • 1.Se6?
      • threat
        • 2.Rf4#
      • 1...Sf3
        • 2.Qh7#
      • 1...Sd3
        • 2.Sg5#
        • 2.Qh7#
      • 1...Sg6
        • 2.Sg5#
      • 1...Rxc2!
    • 1.Qa5?
      • threat
        • 2.Qe1#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rc3
        • 2.Bxd5#
      • 1...Rb4
        • 2.Bxd5#
      • 1...Rc5!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Sc3#
      • 1...Rxc2
        • 2.Qh7#
      • 1...Rc5
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);OGATE,XP(D)::B(E),XR(a)
    • R(a);OGATE::B(E),XP(c)
    • R(a);OGATE,XP(I)::B(E),XP(c)
  • Tries
    • Try
      • S(K);N_PINS(d)
      • Threat
        • R1(B)
      • Vars
        • S(d);N_GUARD::QAB(J)
        • S(d);::R(L)+S(K),DCHECK
      • Refutation
        • R(a);XP(D)
    • Try
      • Q(J);
      • Threat
        • QAR(J)
      • Vars
        • R(a);OGATE,XP(D)::B(E),XR(a)
        • R(a);OGATE::B(E),XP(c)
      • Refutation
        • R(a);
  • Actual
    • S(K);XP(c)
    • Threat
      • S(K)
    • Vars
      • K(b);N_SPINS(d),P_SPINR(a),S_FLIGHT,XS(K)::S(A)
      • R(a);XP(D)::QAB(J)
      • R(a);::R1(B)
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