MESON Chess Problem Database

Problem Display
PID: 28890 (2r1r1B1/p7/3Bn3/p7/pNkNP3/Q1P1K3/2pn4/b4b2 w - - 0 1)

Dombrovskis, Alfreds A

Sushkov, Yuri Akimovich

Shakhmaty v SSSR, 1977

2r1r1B1/p7/3Bn3/p7/pNkNP3/Q1P1K3/2pn4/b4b2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Bxe6#
    • 1...Rf8
      • 2.Bxe6#
    • 1...axb4
      • 2.Qxb4#
  • Tries
    • 1.Sa2?
      • threat
        • 2.Qxa4#
      • 1...Bxc3
        • 2.Qxc3#
      • 1...Rb8
        • 2.Qc5#
      • 1...Sxe4!
    • 1.Sd5?
      • threat
        • 2.Qxa4#
      • 1...Bxc3
        • 2.Qxc3#
      • 1...Sxe4
        • 2.Qa2#
      • 1...Sc5
        • 2.Sb6#
      • 1...Rb8!
    • 1.Qa2+?
      • 1...Kxc3
        • 2.Sd5#
        • 2.Qxc2#
      • 1...Sb3!
  • Keys
    • 1.Qxa4!
      • threat
        • 2.Sa2#
        • 2.Sd5#
      • 1...Kxc3
        • 2.Qxc2#
      • 1...Bxc3
        • 2.Qb5#
      • 1...Sxe4
        • 2.Qb3#
      • 1...axb4
        • 2.Qxb4#
      • 1...Rb8
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(k);N_GUARD::B(H),XS(h)
    • P(g);OGATE,XS(D)::QAR1(A),XP(g)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR2(A),XP(e)
      • Vars
        • B(a);OGATE,XP(B)::QAR1(A),XB(a)
        • R(j);N_GUARD::QAR1(A)
      • Refutation
        • S(d);XP(F)
    • Try
      • S(D);N_PINS(h)
      • Threat
        • QAR2(A),XP(e)
      • Vars
        • B(a);OGATE,XP(B)::QAR1(A),XB(a)
        • S(d);N_GUARD,XP(F)::QAB(A)
        • S(h);P_PINP(F)::B(H)+S(D),DCHECK
      • Refutation
        • R(j);
    • Try
      • Q(A);CHECK
      • Refutation
        • S(d);N_SPINS(h),P_SPINS(d)
  • Actual
    • Q(A);XP(e)
    • Threat
      • DUALS(2)
    • Vars
      • K(f);N_SPINS(h),OGATEB,P-FLIGHT,XP(B)::QAR1(A),XP(c)
      • B(a);SBLOCK,XP(B)::QAB1(A)
      • S(d);N_GUARD,XP(F)::QAB1(A)
      • P(g);OGATE,P_SPINP(g),XS(D)::QAR1(A),XP(g)
      • R(j);N_GUARD::QAR2(A)
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