MESON Chess Problem Database

Problem Display
PID: 36358 (q7/3p2P1/p2P2Q1/2B4p/4P3/K2k4/2R2Pb1/1B5n w - - 0 1)

Lobusov, Andrey Jakovlevic

1st Prize, The Problemist, 1976

q7/3p2P1/p2P2Q1/2B4p/4P3/K2k4/2R2Pb1/1B5n

#2

9 + 7

3771 FIDE Album (1974-1976) 1980
23 Die Schwalbe 2010
133 The Problemist Supplement 2010
133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qxh5?
      • threat
        • 2.Qe2#
      • 1...Kxe4
        • 2.Rc4#
      • 1...Qxe4
        • 2.Qd1#
      • 1...Bf1
        • 2.Qf3#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Sg3!
    • 1.Qf7?
      • threat
        • 2.Qc4#
      • 1...Kxe4
        • 2.Re2#
      • 1...Qxe4
        • 2.Qb3#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qg8!
    • 1.Qg3+?
      • 1...Kxe4
        • 2.Rd2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Sxg3!
    • 1.Qf6?
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Rd2#
      • 1...Qxe4
        • 2.Qc3#
      • 1...Qd5!
    • 1.Qh6?
      • threat
        • 2.Qe3#
      • 1...Qxe4
        • 2.Qd2#
      • 1...Kxe4!
    • 1.g8Q?
      • threat
        • 2.Qb3#
        • 2.Qc4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qb7
        • 2.Qc4#
      • 1...Qb8
        • 2.Qc4#
        • 2.Qd5#
      • 1...Qxg8!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qe3#
      • 1...Kxe4
        • 2.Rc3#
      • 1...Qxe4
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);XP(d)
      • Threat
        • QAB1(H)
      • Vars
        • K(c);S_FLIGHT,XP(E)::B(A)+R(B),DCHECK
        • Q(g);SBLOCK,XP(E)::QAR2(H)
        • B(b);N_GUARD::QAR2(H)
        • B(b);N_GUARD::QAR2(H),XB(b)
      • Refutation
        • S(a);
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • K(c);S_FLIGHT,XP(E)::B(A)+R(B),DCHECK
        • Q(g);SBLOCK,XP(E)::QAR2(H)
        • Q(g);N_GUARD::QAR2(H),XQ(g)
      • Refutation
        • Q(g);
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(E)::B(A)+R(B)
        • B(b);N_GUARD,P_SPINB(b)::QAR2(H),XB(b)
      • Refutation
        • S(a);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • K(c);S_FLIGHT,XP(E)::B(A)+R(B)
        • Q(g);SBLOCK,XP(E)::QAR1(H)
      • Refutation
        • Q(g);
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • Q(g);SBLOCK,XP(E)::QAR1(H)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • P(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);N_GUARD::QAR2(I),XQ(g)
        • Q(g);::QAB1(I)
      • Refutation
        • Q(g);XQ(I)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(c);S_FLIGHT,XP(E)::B(A)+R(B)
      • Q(g);SBLOCK,XP(E)::QAR1(H)
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