MESON Chess Problem Database

Problem Display
PID: 59239 (Q5b1/2n5/8/2ppp3/3kP2r/1PR1pRp1/2P4p/2K1B1bB w - - 0 1)

Novitski, Petr Adrinovich

5th Comm., Troll, 1999-2000

Q5b1/2n5/8/2ppp3/3kP2r/1PR1pRp1/2P4p/2K1B1bB

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rc4#
    • 1...Rxe4
      • 2.Rd3#
    • 1...Se6
      • 2.Qxd5#
    • 1...e2
      • 2.Rfd3#
  • Tries
    • 1.Rxg3?
      • threat
        • 2.Rd3#
      • 1...c4
        • 2.Qa7#
      • 1...dxe4!
    • 1.Rf4?
      • threat
        • 2.Rd3#
      • 1...c4
        • 2.Qa7#
      • 1...exf4!
    • 1.Rf7?
      • threat
        • 2.Rd3#
      • 1...dxe4
        • 2.Rc4#
      • 1...c4
        • 2.Qa7#
      • 1...g2!
    • 1.Qxd5+?
      • 1...Sxd5
        • 2.Rc4#
      • 1...Bxd5!
    • 1.Qa1?
      • threat
        • 2.Rcxe3#
        • 2.Rc4#
      • 1...dxe4
        • 2.Rd3#
      • 1...c4
        • 2.Rxc4#
      • 1...Sb5
        • 2.Rc4#
      • 1...e2
        • 2.Rce3#
        • 2.Rc4#
        • 2.Rfd3#
      • 1...Kxe4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Rc4#
      • 1...Kxe4
        • 2.Qxh4#
      • 1...c4
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(e);P-FLIGHT,P_SPINP(h),XP(H)::R(F)
    • R(f);SBLOCK,XP(H)::R1(F)
    • S(j);N_GUARD,S_CUTB(k)::QAR1(I),XP(h)
    • P(c);OGATE::R1(G)
  • Tries
    • Try
      • R(G);XP(d)
      • Threat
        • R1(F)
      • Vars
        • P(g);OGATEB::QAB(I)
      • Refutation
        • P(h);XP(H)
    • Try
      • R(G);
      • Threat
        • R1(F)
      • Vars
        • P(g);OGATEB::QAB(I)
      • Refutation
        • P(i);XR(G)
    • Try
      • R(G);
      • Threat
        • R1(F)
      • Vars
        • P(h);N_GUARD,XP(H)::R1(F)
        • P(g);OGATEB::QAB(I)
      • Refutation
        • P(d);
    • Try
      • Q(I);CHECK,XP(h)
      • Vars
        • S(j);XQ(I)::R1(F)
      • Refutation
        • B(k);XQ(I)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);SBLOCK,XP(H)::QAB(I)+R(F),DCHECK
        • P(g);::QAB(I)+R(F),DCHECK,XP(g)
        • S(j);::QAB(I)+R(F),DCHECK
      • Refutation
        • K(e);P-FLIGHT,XP(H)
  • Actual
    • Q(I);P_PINP(h)
    • Threat
      • R1(F)
    • Vars
      • K(e);N_SPINP(h),OGATEB,P-FLIGHT,XP(H)::QAR(I),XR(f)
      • P(g);::R1(F),XP(g)
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