MESON Chess Problem Database

Problem Display
PID: 234998 (Q7/4KN2/3P4/3P2n1/4pk2/5pNP/5P2/8 w - - 0 1)

Akimov, Nikolai Nikolaevich

ChessStar, 2018

Q7/4KN2/3P4/3P2n1/4pk2/5pNP/5P2/8

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qe5#
        • 2.Qf6#
      • 1...Sxf7
        • 2.Qf6#
      • 1...Sh7
        • 2.Qe5#
      • 1...Sxh3!
    • 1.Qa4?
      • 1...Sxh3
        • 2.Qxe4#
      • 1...Se6
        • 2.Qxe4#
      • 1...Sh7
        • 2.Qxe4#
      • 1...Sxf7!
    • 1.Qc8?
      • threat
        • 2.Sh5#
        • 2.Qg4#
        • 2.Qf5#
      • 1...Sxh3
        • 2.Sh5#
        • 2.Qf5#
      • 1...Sxf7
        • 2.Qf5#
      • 1...e3
        • 2.Qg4#
        • 2.Qf5#
      • 1...Se6!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qe5#
        • 2.Qf6#
        • 2.Qh4#
      • 1...Sxh3
        • 2.Qh4#
      • 1...Sxf7
        • 2.Qf6#
      • 1...Sh7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XS(G)::QAR2(H)
        • S(d);::QAB1(H)
      • Refutation
        • S(d);XP(C)
    • Try
      • Q(H);P_PINP(b)
      • Vars
        • S(d);N_GUARD,XP(C)::QAR1(H),XP(b)
        • S(d);N_GUARD::QAR1(H),XP(b)
      • Refutation
        • S(d);XS(G)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • S(d);XS(G)::QAR1(H)
      • Refutation
        • S(d);
  • Actual
    • Q(H);
    • Threat
      • DUALS(3)
    • Vars
      • S(d);XP(C)::QAR2(H)
      • S(d);XS(G)::QAR2(H)
      • S(d);::QAB1(H)
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