MESON Chess Problem Database

Problem Display
PID: 169061 (4N2n/2Np4/1B3Rp1/4k3/2pr2P1/2Qp1KP1/rp6/6b1 w - - 0 1)

Novitski, Petr Adrinovich

5th Place, SuperProblem 021. TT, 2012

4N2n/2Np4/1B3Rp1/4k3/2pr2P1/2Qp1KP1/rp6/6b1

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Bxd4#
      • 2.Qxd4#
    • 1...g5
      • 2.Rf5#
    • 1...d5
      • 2.Re6#
    • 1...d6
      • 2.Re6#
  • Tries
    • 1.Qe1+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Be3!
    • 1.Qa5+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5
        • 2.Re6#
      • 1...Rxa5!
    • 1.Qa3?
      • threat
        • 2.Qe7#
      • 1...Rf4+
        • 2.gxf4#
      • 1...Rd6
        • 2.Qxd6#
      • 1...d6
        • 2.Re6#
      • 1...Rxa3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe7#
      • 1...Rf4+
        • 2.gxf4#
      • 1...Rd6
        • 2.Qxd6#
      • 1...d6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(h);N_GUARD::R1(F)
    • P(i);N_GUARD::R1(F)
  • Tries
    • Try
      • Q(A);CHECK,N_PINR(f)
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(A),XR(f)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);CHECK,N_PINR(f)
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(A),XR(f)
        • P(i);P_SPINP(i)::R1(F)
      • Refutation
        • R(b);XQ(A)
    • Try
      • Q(A);N_PINR(f)
      • Threat
        • QAR2(A)
      • Vars
        • R(f);CHECK,OGATE::P(C),XR(f)
        • R(f);N_GUARD::QAB1(A),XR(f)
        • P(i);N_GUARD::R1(F)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • Q(A);N_PINR(f)
    • Threat
      • QAR2(A)
    • Vars
      • R(f);CHECK,OGATE::P(C),XR(f)
      • R(f);N_GUARD::QAB1(A),XR(f)
      • P(i);N_GUARD::R1(F)
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