MESON Chess Problem Database

Problem Display
PID: 15829 (2R2b2/2p4r/1N2PB1p/1PNPr3/1p1k4/8/1K6/2Q2B2 w - - 0 1)

Lobusov, Andrey Jakovlevic

2nd Prize, Hlas l'udu, 1988

2R2b2/2p4r/1N2PB1p/1PNPr3/1p1k4/8/1K6/2Q2B2

#2

10 + 7

3297 FIDE Album (1986-1988) 1995
3713 Snap 2009
133 The Problemist Supplement 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc5
      • 2.Qf4#
    • 1...b3
      • 2.Qc3#
    • 1...cxb6
      • 2.Qd2#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...cxb6!
    • 1.Sba4?
      • threat
        • 2.Qd2#
      • 1...Kxd5
        • 2.Qd2#
        • 2.Qd1#
      • 1...Bxc5!
    • 1.Be2?
      • threat
        • 2.Qg1#
      • 1...Bxc5
        • 2.Qf4#
      • 1...cxb6
        • 2.Qd2#
      • 1...Rg7!
    • 1.Rxc7?
      • threat
        • 2.Qd2#
        • 2.Qf4#
      • 1...Bxc5
        • 2.Qf4#
      • 1...Rxc7!
    • 1.Qe1?
      • threat
        • 2.Sb3#
        • 2.Qf2#
      • 1...Bxc5
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...cxb6
        • 2.Qd2#
        • 2.Qe4#
        • 2.Qxe5#
      • 1...b3
        • 2.Sxb3#
        • 2.Qf2#
        • 2.Qc3#
      • 1...Kxc5!
    • 1.Qc2?
      • threat
        • 2.Qf2#
      • 1...Bxc5
        • 2.Qd3#
      • 1...cxb6
        • 2.Qd3#
        • 2.Qe4#
        • 2.Qd2#
      • 1...Ke3!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Qg1#
      • 1...Bxc5
        • 2.Qd2#
      • 1...cxb6
        • 2.Qf4#

This anticipates 90171(1999)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(g);SBLOCK,XS(E)::QAR2(A)
    • P(a);N_GUARD::QAB1(A)
    • P(e);XS(G)::QAR2(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR2(A)
      • Vars
        • K(b);N_SPINR(c),P-FLIGHT::QAR1(A)
      • Refutation
        • P(e);XS(G)
    • Try
      • S(G);
      • Threat
        • QAR2(A)
      • Refutation
        • B(g);XS(E)
    • Try
      • B(B);
      • Threat
        • QAB(A)
      • Vars
        • B(g);SBLOCK,XS(E)::QAR2(A)
        • P(e);XS(G)::QAR2(A)
      • Refutation
        • R(f);
    • Try
      • R(J);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XS(E)::QAR2(A)
      • Refutation
        • R(f);XR(J)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);N_SPINR(c),P_SPINP(e),S_FLIGHT,XS(E)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • B(g);SBLOCK,XS(E)::QAR1(A)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
  • Actual
    • B(B);
    • Threat
      • QAB(A)
    • Vars
      • B(g);SBLOCK,XS(E)::QAR2(A)
      • P(e);XS(G)::QAR2(A)
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