MESON Chess Problem Database

Problem Display
PID: 42870 (Q4B2/rq1R1B1b/1P2Pp2/pN4bR/KpkN4/3p4/8/5n2 w - - 0 1)

Lobusov, Andrey Jakovlevic

1st Prize, Die Schwalbe, 1983

Q4B2/rq1R1B1b/1P2Pp2/pN4bR/KpkN4/3p4/8/5n2

#2

10 + 10

3748 FIDE Album (1983-1985) 1992
23 Die Schwalbe 2004
133 The Problemist Supplement 2010
15652 Tehtavaniekka 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qa6
      • 2.Qd5#
      • 2.Qc6#
    • 1...Qc6
      • 2.Qxc6#
    • 1...Qc8
      • 2.Qd5#
    • 1...Qxb6
      • 2.Qd5#
    • 1...Qc7
      • 2.Qd5#
    • 1...Qxd7
      • 2.exd7#
    • 1...Qb8
      • 2.Qd5#
      • 2.Qc6#
    • 1...Bc1
      • 2.Rc5#
    • 1...Bd2
      • 2.Rc5#
    • 1...Be3
      • 2.Rc5#
    • 1...Bf4
      • 2.Rc5#
    • 1...Bh4
      • 2.Rc5#
    • 1...Bh6
      • 2.Rc5#
  • Tries
    • 1.Se2?
      • threat
        • 2.Rd4#
      • 1...Qxb6
        • 2.Qd5#
      • 1...Qxd7
        • 2.exd7#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Be3
        • 2.Sd6#
      • 1...Qe4!
    • 1.Sc6?
      • threat
        • 2.Rd4#
      • 1...Qxd7
        • 2.exd7#
      • 1...Be3
        • 2.e7#
      • 1...Qxb6!
    • 1.e7+?
      • 1...Qd5
        • 2.Qxd5#
        • 2.Qc6#
      • 1...Kc5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rd4#
      • 1...Qxb6
        • 2.Qd5#
      • 1...Qxd7
        • 2.exd7#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Be3
        • 2.Sfd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(i);OGATE::QAB1(I),XQ(i)
    • Q(i);OGATE,P_PINS(C)::QAR2(I),XQ(i)
    • Q(i);OGATE::QAB1(I)
    • Q(i);OGATE,XP(E)::QAB1(I)
    • Q(i);OGATE,P_PINS(C),XR(G)::B(H)+P(F),XQ(i)
    • B(f);OGATE::R1(D)
  • Tries
    • Try
      • S(B);
      • Threat
        • R1(G)
      • Vars
        • Q(i);OGATE,XP(E)::QAB1(I)
        • Q(i);OGATE,P_PINS(C),XR(G)::B(H)+P(F),XQ(i)
        • Q(i);OGATE::QAB1(I),XQ(i)
        • B(f);::S(C)
      • Refutation
        • Q(i);
    • Try
      • S(B);
      • Threat
        • R1(G)
      • Vars
        • Q(i);OGATE,XR(G)::B(H)+P(F),XQ(i)
        • B(f);::B(H)+P(F)
      • Refutation
        • Q(i);XP(E)
    • Try
      • P(F);CHECK
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(f)
  • Actual
    • S(B);
    • Threat
      • R1(G)
    • Vars
      • Q(i);OGATE,XP(E)::QAB1(I)
      • Q(i);OGATE,P_PINS(C),XR(G)::B(H)+P(F),XQ(i)
      • Q(i);OGATE::QAR2(I),XQ(i)
      • Q(i);OGATE::QAB1(I),XQ(i)
      • B(f);::S(B)
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