MESON Chess Problem Database

Problem Display
PID: 263099 (3R4/8/2Q5/1p6/3P4/1P1kb1n1/1P1p4/n2K4 w - - 0 1)

Koshel, Mikhail Igorevich

6th Comm., SuperProblem, 2020

3R4/8/2Q5/1p6/3P4/1P1kb1n1/1P1p4/n2K4

#2

6 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Qf3#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sxb3
      • 2.Qc2#
    • 1...Sf1
      • 2.Qg6#
    • 1...Sh1
      • 2.Qg6#
    • 1...Se2
      • 2.Qg6#
    • 1...Se4
      • 2.Qxb5#
    • 1...Sh5
      • 2.Qg6#
  • Tries
    • 1.Qg6+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Se4!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qc3#
      • 1...Kxd4
        • 2.Qd6#
      • 1...Bxd4
        • 2.Qxb5#
      • 1...Se2
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(d);OGATEB,P_SPINB(d),XP(D)::QAR2(E)
    • S(a);N_GUARD::QAB1(E),XS(a)
    • S(a);N_GUARD,XP(C)::QAB1(E)
    • S(e);N_GUARD::QAB(E)
    • S(e);SBLOCK::QAB(E),XP(f)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB(E),XS(e)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • R(F);
    • Threat
      • QAR1(E)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(D)::QAR2(E)
      • B(d);SBLOCK,XP(D)::QAB(E),XP(f)
      • S(e);N_GUARD::QAB1(E)
      • S(e);N_GUARD::QAB1(E),XS(e)
      • P(f);N_GUARD::QAB1(E)
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