MESON Chess Problem Database

Problem Display
PID: 138167 (4Nbkr/5p1p/5Qnp/5N2/8/8/b7/K7 w - - 0 1)

Nesic, Milivoj S

Politika, 1964

4Nbkr/5p1p/5Qnp/5N2/8/8/b7/K7

#2

4 + 8

5454 Near Snap 2011
6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qg7#
    • 1...Bb4
      • 2.Qg7#
    • 1...Bc5
      • 2.Qg7#
    • 1...Bd6
      • 2.Qg7#
    • 1...Be7
      • 2.Qg7#
    • 1...Bg7
      • 2.Qxg7#
  • Tries
    • 1.Se7+?
      • 1...Bxe7
        • 2.Qg7#
      • 1...Sxe7!
    • 1.Qc3?
      • threat
        • 2.Sf6#
      • 1...Ba3
        • 2.Qg7#
      • 1...Bb4
        • 2.Qg7#
      • 1...Bc5
        • 2.Qg7#
      • 1...Bd6
        • 2.Qg7#
      • 1...Be7
        • 2.Qg7#
      • 1...Bg7
        • 2.Qxg7#
      • 1...f6!
    • 1.Qd4?
      • threat
        • 2.Sf6#
      • 1...Ba3
        • 2.Qg7#
      • 1...Bb4
        • 2.Qg7#
      • 1...Bc5
        • 2.Qg7#
      • 1...Bd6
        • 2.Qg7#
      • 1...Be7
        • 2.Qg7#
      • 1...Bg7
        • 2.Qxg7#
      • 1...f6!
    • 1.Qe5?
      • threat
        • 2.Sf6#
      • 1...Ba3
        • 2.Qg7#
      • 1...Bb4
        • 2.Qg7#
      • 1...Bc5
        • 2.Qg7#
      • 1...Bd6
        • 2.Qg7#
      • 1...Be7
        • 2.Qg7#
      • 1...Bg7
        • 2.Qxg7#
      • 1...f6!
    • 1.Qxh8+?
      • 1...Sxh8
        • 2.Sf6#
      • 1...Kxh8!
    • 1.Qxg6+?
      • 1...Bg7+
        • 2.Qxg7#
      • 1...hxg6
        • 2.Sf6#
      • 1...fxg6!
    • 1.Qxf7+?
      • 1...Bxf7
        • 2.Sf6#
      • 1...Kxf7!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Sf6#
      • 1...Ba3
        • 2.Qg7#
      • 1...Bb4
        • 2.Qg7#
      • 1...Bc5
        • 2.Qg7#
      • 1...Bd6
        • 2.Qg7#
      • 1...Be7
        • 2.Qg7#
      • 1...Bg7
        • 2.Qxg7#
      • 1...f6
        • 2.Qxa2#

Anticipated by 21402(1918)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD::QAR1(C)
    • B(f);N_GUARD,P_PINQ(C)::QAR1(C),XB(f)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(f);XS(B)::QAR1(C)
      • Refutation
        • S(b);XS(B)
    • Try
      • Q(C);
      • Threat
        • S(D)
      • Vars
        • B(f);N_GUARD::QAR1(C)
        • B(f);N_GUARD,P_PINQ(C)::QAR1(C),XB(f)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Threat
        • S(D)
      • Vars
        • B(f);N_GUARD::QAR1(C)
        • B(f);N_GUARD,P_PINQ(C)::QAR1(C),XB(f)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Threat
        • S(D)
      • Vars
        • B(f);N_GUARD::QAR1(C)
        • B(f);N_GUARD,P_PINQ(C)::QAR1(C),XB(f)
      • Refutation
        • P(d);
    • Try
      • Q(C);CHECK,XR(h)
      • Vars
        • S(b);SBLOCK,XQ(C)::S(D)
      • Refutation
        • K(g);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK,XS(b)
      • Vars
        • B(f);CHECK,N_GUARD,P_SPINB(f)::QAR1(C),XB(f)
        • P(e);XQ(C)::S(D)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);CHECK,XP(d)
      • Vars
        • B(a);SBLOCK,XQ(C)::S(D)
      • Refutation
        • K(g);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • S(D)
    • Vars
      • B(f);N_GUARD::QAR1(C)
      • B(f);N_GUARD,P_PINQ(C)::QAR1(C),XB(f)
      • P(d);OGATEB::QAB(C),XB(a)
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