MESON Chess Problem Database

Problem Display
PID: 135704 (8/pN1Bp3/k3n3/BRP5/4r3/4Q3/p7/K3R1b1 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Markovtsy, Vassyl Yuriovich

Comm., The Problemist, 2010

8/pN1Bp3/k3n3/BRP5/4r3/4Q3/p7/K3R1b1

#2

8 + 7

56 The Problemist 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qxe6#
    • 1...Rb4
      • 2.Qxe6#
    • 1...Rc4
      • 2.Qxe6#
    • 1...Rf4
      • 2.Qxe6#
    • 1...Rg4
      • 2.Qxe6#
    • 1...Rh4
      • 2.Qxe6#
    • 1...Sxc5
      • 2.Sxc5#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Bb4#
      • 1...Rxe1+
        • 2.Bxe1#
      • 1...Bd4+
        • 2.Bc3#
      • 1...Re3
        • 2.Bc3#
      • 1...Ra4
        • 2.Rxe6#
      • 1...Rb4
        • 2.Bxb4#
        • 2.Rxe6#
      • 1...Sxc5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Rb6#
      • 1...Rxe1+
        • 2.Rb1#
      • 1...Bd4+
        • 2.Rb2#
      • 1...Rc4
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(c);OGATE::QAR(C),XS(e)
    • R(c);OGATE,SBLOCK::QAR(C),XS(e)
    • S(e);XP(F)::S(G),XS(e)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR(C)+B(D)
      • Vars
        • R(c);CHECK,OGATE,XR(B)::QAR(C)+B(D),XR(c)
        • B(a);CHECK,S_CUTR(c)::QAR(C)+B(D)
        • R(c);N_GUARD::QAR(C)+B(D)
        • R(c);OGATE::R(B),XS(e)
      • Refutation
        • S(e);XP(F)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(E),DCHECK
    • Vars
      • R(c);CHECK,N_GUARD,XR(B)::QAB(C)+R(E)
      • B(a);CHECK,S_CUTR(c)::QAB(C)+R(E)
      • R(c);OGATE::R(B),XS(e)
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