MESON Chess Problem Database

Problem Display
PID: 205018 (8/8/4pp2/1Q2Nk2/2K3R1/8/8/8 w - - 0 1)

Kirichenko, Anatoly Yakovlevich

Kudesnik, 2011

8/8/4pp2/1Q2Nk2/2K3R1/8/8/8

#2

4 + 3

15148 Sadier Collection 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kc5?
      • 1...Kxe5
        • 2.Kc6#
      • 1...fxe5!
    • 1.Sd3+?
      • 1...e5
        • 2.Qd7#
      • 1...Kxg4!
    • 1.Sf3+?
      • 1...e5
        • 2.Qd7#
      • 1...Kxg4!
    • 1.Sg6+?
      • 1...e5
        • 2.Qd7#
      • 1...Kxg4!
    • 1.Sf7+?
      • 1...e5
        • 2.Qd7#
      • 1...Kxg4!
    • 1.Qe8?
      • threat
        • 2.Qh5#
      • 1...fxe5
        • 2.Qg6#
      • 1...Kxe5!
    • 1.Qb3?
      • 1...fxe5
        • 2.Qf3#
      • 1...Kxe5!
    • 1.Qb4?
      • 1...Kxe5
        • 2.Qc5#
      • 1...fxe5!
    • 1.Qd5?
      • threat
        • 2.Qe4#
      • 1...fxe5
        • 2.Qf3#
      • 1...exd5+!
    • 1.Qb6?
      • 1...Kxe5
        • 2.Qc5#
      • 1...fxe5!
    • 1.Qb7?
      • threat
        • 2.Qe4#
      • 1...fxe5
        • 2.Qf3#
      • 1...Kxe5!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qe4#
      • 1...Kxe5
        • 2.Qc5#
      • 1...fxe5
        • 2.Qf3#

Anticipated by 206384(1925)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR(C)+K(A)
      • Refutation
        • P(c);XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b)::QAB(C)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(D);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b)::QAB(C)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(D);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b)::QAB(C)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(D);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b)::QAB(C)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • P(c);SBLOCK,XS(D)::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XS(D)
    • Try
      • Q(C);
      • Vars
        • P(c);SBLOCK,XS(D)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(C);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(D)::QAR2(C)
      • Refutation
        • P(c);XS(D)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);P_SPINP(c),SBLOCK,XS(D)::QAR2(C)
      • Refutation
        • P(b);CHECK,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(D)::QAR2(C)
      • Refutation
        • P(c);XS(D)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);SBLOCK,XS(D)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(D)::QAR2(C)
      • P(c);SBLOCK,XS(D)::QAR2(C)
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