MESON Chess Problem Database

Problem Display
PID: 251199 (7B/p2Q4/3Pp3/Kp1k4/1Pp1p3/2P1P2p/R2NPPq1/7B w - - 0 1)

Permyakov, Evgeni Nikolaevich

Vasilenko, Anatoly Grigorovich

4th HM., Uralski Problemist-20 JT, 2013

7B/p2Q4/3Pp3/Kp1k4/1Pp1p3/2P1P2p/R2NPPq1/7B

#2

12 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Bxe4#
    • 1...Qg1
      • 2.Bxe4#
    • 1...Qxf2
      • 2.Bxe4#
    • 1...Qh2
      • 2.Bxe4#
    • 1...Qg3
      • 2.Bxe4#
    • 1...Qg5
      • 2.Bxe4#
    • 1...Qg8
      • 2.Bxe4#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Qxb5#
      • 1...Kxc4
        • 2.Qxe6#
      • 1...bxc4
        • 2.Rd2#
      • 1...a6
        • 2.Sb6#
      • 1...e5!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Qb7#
      • 1...Kxe4
        • 2.Qxe6#
      • 1...Qxe4
        • 2.Rd2#
      • 1...Qg7
        • 2.Qxb5#
      • 1...e5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(a);OGATE,P_SPINP(d)::B(A),XP(d)
    • Q(a);OGATE,P_SPINP(d),XP(E)::B(A),XP(d)
  • Tries
    • Try
      • S(C);XP(c)
      • Threat
        • QAR2(K),XP(e)
      • Vars
        • K(f);N_GUARD,S_FLIGHT,XS(C)::QAB(K),XP(g)
        • P(e);SBLOCK,XS(C)::R(B)
        • P(h);N_GUARD::S(C)
      • Refutation
        • P(g);
  • Actual
    • S(C);XP(d)
    • Threat
      • QAB(K)
    • Vars
      • K(f);N_GUARD,P_SPINQ(a),S_FLIGHT,XS(C)::QAR2(K),XP(g)
      • Q(a);P_SPINQ(a),XS(C)::R(B)
      • Q(a);::QAR2(K),XP(e)
      • P(g);SBLOCK::S(C)
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