MESON Chess Problem Database

Problem Display
PID: 7956 (5N2/1K1p1qP1/3N4/1p1kP3/1Pp1R1P1/1Q3P2/7B/3r1r1B w - - 0 1)

Vaughan, Colin V

The Problemist, 1994

5N2/1K1p1qP1/3N4/1p1kP3/1Pp1R1P1/1Q3P2/7B/3r1r1B

#2

12 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Sc3#
        • 2.Sc7#
        • 2.Qxc4#
      • 1...Qxf3
        • 2.Qxc4#
      • 1...Qxf8
        • 2.Sc7#
        • 2.Qxc4#
      • 1...Rxf3
        • 2.Qxc4#
      • 1...cxb3
        • 2.Sc3#
        • 2.Sc7#
      • 1...Rc1
        • 2.Sc7#
        • 2.Rd4#
      • 1...Rd3
        • 2.Sc7#
        • 2.Qxc4#
      • 1...Rd4
        • 2.Sc3#
        • 2.Sc7#
        • 2.Rxd4#
      • 1...d6+!
    • 1.Qe3?
      • threat
        • 2.Qc5#
      • 1...Rd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Qxf8!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.Re4#
      • 1...Qxf3
        • 2.g8Q#
        • 2.g8B#
      • 1...Rxf3
        • 2.Qxd1#
      • 1...bxc4
        • 2.Qxc4#
      • 1...Rb1
        • 2.Qd3#
      • 1...Rc1
        • 2.Qd3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rd4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(I);XP(d)
      • Threat
        • DUALS(3)
      • Vars
        • Q(g);XP(D)::QAB1(C),XP(c)
        • R(b);XP(D)::QAB1(C),XP(c)
      • Refutation
        • P(f);CHECK
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • QAR1(C)
      • Refutation
        • Q(g);XS(L)
  • Actual
    • R(F);XP(c)
    • Threat
      • QAB(C)+R(F)
    • Vars
      • Q(g);P_SPINQ(g),XP(D)::P=Q
      • R(b);N_GUARD,P_SPINR(b),XP(D)::QAR(C),XR(a)
      • P(d);OGATE,P_SPINP(d),XR(F)::QAB1(C),XP(d)
      • R(a);N_GUARD::QAR2(C)
      • R(a);N_GUARD::QAR2(C),XR(a)
      • R(a);SBLOCK::QAB(C)+R(F),DCHECK
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