MESON Chess Problem Database

Problem Display
PID: 246647 (1n6/8/1n3p2/1K6/3kpNN1/p1pPp3/4P3/3Q4 w - - 0 1)

Janevski, Zivko

Moscow Ty., 2015

1n6/8/1n3p2/1K6/3kpNN1/p1pPp3/4P3/3Q4

#2

6 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qxa4#
    • 1...Sc4
      • 2.dxc4#
    • 1...Sd5
      • 2.Se6#
    • 1...S6d7
      • 2.Qa4#
    • 1...Sa8
      • 2.Qa4#
    • 1...Sc8
      • 2.Qa4#
    • 1...c2
      • 2.Qa1#
    • 1...exd3
      • 2.Qxd3#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Se6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...exd3!
    • 1.Qa4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxa4!
    • 1.Qc1?
      • threat
        • 2.Qxe3#
      • 1...c2
        • 2.Qa1#
      • 1...Sd5
        • 2.Se6#
      • 1...Sc4!
    • 1.Qg1?
      • threat
        • 2.Qxe3#
      • 1...c2
        • 2.Qa1#
      • 1...Sd5
        • 2.Se6#
      • 1...Sc4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qxe4#
      • 1...exd3
        • 2.Se6#
      • 1...c2
        • 2.Qa1#
      • 1...f5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • S(f);N_GUARD::QAR(A),XS(f)
    • S(f);OGATE::QAR(A)+P(C),XS(f)
    • S(f);SBLOCK::S(D)
    • S(f);N_GUARD::QAR(A)
    • P(b);OGATEB::QAB(A)
    • P(e);OGATE,P_SPINP(e),XP(C)::QAR1(A),XP(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(D)
      • Vars
        • S(f);N_GUARD::QAR1(A),XS(f)
      • Refutation
        • P(e);XP(C)
    • Try
      • Q(A);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR1(A),XS(f)
      • Refutation
        • S(f);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • P(b);OGATEB::QAB(A)
        • S(f);SBLOCK::S(D)
      • Refutation
        • S(f);
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • P(b);OGATEB::QAB(A)
        • S(f);SBLOCK::S(D)
      • Refutation
        • S(f);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(e)
    • Vars
      • P(e);XP(C)::S(D)
      • P(b);OGATEB::QAB(A)
      • P(g);OGATEB::QAB(A)
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