MESON Chess Problem Database

Problem Display
PID: 244352 (2B2R1K/4k1NN/3n4/1p2pn2/1BP5/3pb3/Q7/5q2 w - - 0 1)

Vasilenko, Anatoly Grigorovich

Die Schwalbe, 2020

2B2R1K/4k1NN/3n4/1p2pn2/1BP5/3pb3/Q7/5q2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Sxf5#
    • 1...Qg2
      • 2.Sxf5#
    • 1...Qa1
      • 2.Sxf5#
    • 1...Qb1
      • 2.Sxf5#
    • 1...Qc1
      • 2.Sxf5#
    • 1...Qd1
      • 2.Sxf5#
    • 1...Qe1
      • 2.Sxf5#
    • 1...Qg1
      • 2.Sxf5#
    • 1...Qh1
      • 2.Sxf5#
    • 1...Bc1
      • 2.Qa7#
    • 1...Bd2
      • 2.Qa7#
    • 1...Bf2
      • 2.Sxf5#
    • 1...Bf4
      • 2.Sxf5#
      • 2.Qa7#
    • 1...Bg5
      • 2.Qa7#
    • 1...Bh6
      • 2.Qa7#
    • 1...Ba7
      • 2.Qxa7#
    • 1...Sd4
      • 2.Qa7#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qb7#
      • 1...Qxg2
        • 2.Sxf5#
      • 1...Qh1
        • 2.Sxf5#
      • 1...Bc5
        • 2.Qg5#
      • 1...Bb6
        • 2.Qg5#
      • 1...e4
        • 2.Qxe4#
      • 1...Qf3!
    • 1.cxb5?
      • threat
        • 2.Re8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bc5
        • 2.Qe6#
      • 1...Sg3
        • 2.Re8#
        • 2.Qe6#
      • 1...Sd4
        • 2.Re8#
        • 2.Qa7#
      • 1...Sh4
        • 2.Re8#
        • 2.Qe6#
      • 1...Sh6
        • 2.Re8#
        • 2.Qe6#
      • 1...Sxg7!
  • Keys
    • 1.c5!
      • threat
        • 2.Qe6#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...Sxg7
        • 2.cxd6#
      • 1...Se8
        • 2.Rxe8#
      • 1...Sd4
        • 2.cxd6#
      • 1...Sc4
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 15
  • Sets
    • Q(a);N_GUARD::S(D),XS(f)
    • Q(a);N_GUARD,P_PINS(E)::S(D),XS(f)
    • B(c);N_GUARD::QAR(A)
    • B(c);S_CUTQ(a)::S(D),XS(f)
    • B(c);N_GUARD::QAR(A),XB(c)
    • S(f);S_CUTB(c)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • Q(a);N_GUARD,XQ(A)::S(D),XS(f)
        • Q(a);N_GUARD,P_PINS(E)::S(D),XS(f)
        • B(c);N_GUARD,N_SPINS(g)::QAB(A)
        • B(c);N_GUARD::QAB(A)
        • P(e);OGATEB::QAR(A),XP(e)
      • Refutation
        • Q(a);
    • Try
      • P(C);XP(d)
      • Threat
        • DUALS(3)
      • Vars
        • B(c);N_SPINS(g)::QAR1(A)
      • Refutation
        • S(f);XS(D)
  • Actual
    • P(C);N_PINS(g)
    • Threat
      • QAR1(A)
    • Vars
      • S(g);CHECK,N_GUARD::QAR1(A),XS(g)
      • S(f);N_GUARD,XS(D)::P(C),XS(g)
      • S(g);N_GUARD::R1(G),XS(g)
      • S(f);N_GUARD::P(C),XS(g)
      • S(g);N_GUARD::QAR(A)
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