MESON Chess Problem Database

Problem Display
PID: 204915 (K5b1/3Qp3/2N5/1pp3r1/2PNkpP1/1PRpPR1n/6P1/8 w - - 0 1)

Novitski, Petr Adrinovich

PZSzach, 2019

K5b1/3Qp3/2N5/1pp3r1/2PNkpP1/1PRpPR1n/6P1/8

#2

11 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rg6
      • 2.Qf5#
    • 1...Rg7
      • 2.Qf5#
    • 1...cxd4
      • 2.Qxd4#
  • Tries
    • 1.Qe6+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Bxe6!
    • 1.Qxe7+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Be6!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qxd3#
      • 1...bxc4
        • 2.Rxc4#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Sf2
        • 2.Sxg5#
      • 1...d2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(g);N_GUARD,XP(H)::QAB1(J)
    • R(g);N_GUARD::QAB1(J),XR(g)
    • R(g);N_GUARD::QAB1(J)
    • P(f);OGATE,XS(G)::QAR1(J),XP(f)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(J),XR(g)
      • Refutation
        • B(i);XQ(J)
    • Try
      • Q(J);CHECK,XP(h)
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(J),XR(g)
      • Refutation
        • B(i);P_SPINB(i)
  • Actual
    • S(G);
    • Threat
      • QAB1(J),XP(a)
    • Vars
      • P(e);OGATE,XP(F)::R(C),XP(e)
      • R(g);N_GUARD::QAB1(J),XR(g)
      • S(b);N_GUARD::S(G),XR(g)
      • P(a);::QAB1(J)
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