MESON Chess Problem Database

Problem Display
PID: 244683 (8/4K3/6p1/7p/6Pk/4Q3/5N2/8 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Sem Shakhmatnikh not, 2018

8/4K3/6p1/7p/6Pk/4Q3/5N2/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Qh3#
  • Tries
    • 1.Kd6?
      • 1...g5
        • 2.Qh3#
      • 1...hxg4!
    • 1.Ke6?
      • 1...g5
        • 2.Qh3#
      • 1...hxg4!
    • 1.Kd7?
      • 1...g5
        • 2.Qh3#
      • 1...hxg4!
    • 1.Kf7?
      • 1...g5
        • 2.Qh3#
      • 1...hxg4!
    • 1.Kd8?
      • 1...g5
        • 2.Qh3#
      • 1...hxg4!
    • 1.Ke8?
      • 1...g5
        • 2.Qh3#
      • 1...hxg4!
    • 1.Kf8?
      • 1...g5
        • 2.Qh3#
      • 1...hxg4!
    • 1.Sh1?
      • 1...hxg4
        • 2.Qh6#
      • 1...g5
        • 2.Qg3#
      • 1...Kxg4!
    • 1.Se4?
      • threat
        • 2.Qg3#
      • 1...hxg4
        • 2.Qh6#
      • 1...Kxg4!
    • 1.Qf3?
      • 1...hxg4
        • 2.Qxg4#
      • 1...g5
        • 2.Qh3#
      • 1...Kg5!
    • 1.Qe5?
      • 1...g5
        • 2.Qh2#
      • 1...hxg4!
    • 1.gxh5?
      • 1...gxh5
        • 2.Qf4#
      • 1...g5
        • 2.Qh3#
      • 1...Kxh5!
  • Keys
    • 1.Qf4!
      • threat
        • 2.g5#
      • 1...hxg4
        • 2.Qxg4#
      • 1...g5
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR1(B)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • S(A);
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(B)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • S(A);
      • Threat
        • QAB1(B)
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • Q(B);
      • Vars
        • P(b);OGATE,XP(C)::QAR1(B),XP(b)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • P(b);XP(C)
    • Try
      • P(C);XP(b)
      • Vars
        • P(c);SBLOCK,XP(C)::QAR2(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)+P(C)
    • Vars
      • P(b);OGATE,P_SPINP(b),XP(C)::QAR1(B),XP(b)
      • P(c);SBLOCK::QAR2(B)
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