MESON Chess Problem Database

Problem Display
PID: 234986 (8/8/6P1/p1pp4/2k5/P2N4/1R1K4/1Q6 w - - 0 1)

Akimov, Nikolai Nikolaevich

64 Shakhmatnoe obozrenie, 2014

8/8/6P1/p1pp4/2k5/P2N4/1R1K4/1Q6

#2

6 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qa2#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Rc2#
        • 2.Qc2#
        • 2.Qc1#
      • 1...Kc3
        • 2.Rc2#
        • 2.Qc2#
        • 2.Qc1#
      • 1...d4+!
    • 1.Sc1?
      • threat
        • 2.Qd3#
      • 1...d4
        • 2.Qa2#
      • 1...Kd4!
    • 1.Se1?
      • threat
        • 2.Qd3#
      • 1...d4
        • 2.Qa2#
      • 1...Kd4!
    • 1.Sf2?
      • threat
        • 2.Qd3#
      • 1...d4
        • 2.Qa2#
      • 1...Kd4!
    • 1.Qa1?
      • 1...Kd4
        • 2.Rb4#
      • 1...d4
        • 2.Qa2#
      • 1...a4!
    • 1.Qe1?
      • 1...Kd4
        • 2.Qh4#
      • 1...d4
        • 2.Qe6#
      • 1...a4!
    • 1.Qf1?
      • 1...Kd4
        • 2.Qf4#
      • 1...d4
        • 2.Qf7#
      • 1...a4!
    • 1.Qh1?
      • 1...Kd4
        • 2.Qh4#
      • 1...d4
        • 2.Se5#
      • 1...a4!
    • 1.a4?
      • 1...d4
        • 2.Qa2#
      • 1...Kd4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qa4#
      • 1...Kd4
        • 2.Qg4#
      • 1...a4
        • 2.Qxa4#
      • 1...d4
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::QAB(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • P(d);CHECK
    • Try
      • S(E);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAB(A)+R(B),DCHECK
        • P(d);SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(d);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(d);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(d);SBLOCK::S(E)
      • Refutation
        • P(b);
    • Try
      • P(D);
      • Vars
        • P(d);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);P-FLIGHT::QAR(A)
      • P(b);::QAR2(A),XP(b)
      • P(d);SBLOCK::QAB1(A)
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