MESON Chess Problem Database

Problem Display
PID: 42655 (B6K/7Q/3pPR2/3p4/2NkN3/1P6/4P3/6b1 w - - 0 1)

Karpov, Valery N

Voronov, Sergey

1st HM., Lenin MT, 1970

B6K/7Q/3pPR2/3p4/2NkN3/1P6/4P3/6b1

#2

9 + 4

3751 FIDE Album (1968-1970) 1977
56 The Problemist 2012

SOLUTION

  • SOUND
  • Tries
    • 1.Rf3?
      • threat
        • 2.Rd3#
      • 1...dxc4
        • 2.Qg7#
      • 1...dxe4
        • 2.Qa7#
      • 1...Be3!
    • 1.Rf5?
      • threat
        • 2.Rxd5#
      • 1...dxc4
        • 2.Qa7#
      • 1...dxe4
        • 2.Qg7#
      • 1...Kxe4!
    • 1.Qh3?
      • threat
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qg4#
        • 2.Qd3#
        • 2.Qh4#
      • 1...dxc4
        • 2.Qc3#
      • 1...Be3
        • 2.Qxe3#
      • 1...dxe4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rf4#
      • 1...Kxe4
        • 2.Qg4#
      • 1...dxc4
        • 2.Rf3#
      • 1...dxe4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);
      • Threat
        • R1(F)
      • Vars
        • P(c);XS(C)::QAB(G)
        • P(c);XS(D)::QAB(G)
      • Refutation
        • B(a);
    • Try
      • R(F);
      • Threat
        • R1(F),XP(c)
      • Vars
        • P(c);XS(C)::QAB(G)
        • P(c);XS(D)::QAB(G)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c),XS(D)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(c);XS(C)::QAB1(G)
        • B(a);N_GUARD::QAB1(G),XB(a)
      • Refutation
        • P(c);XS(D)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+R(F)
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINP(c),XS(D)::QAR2(G)
      • P(c);XS(C)::QAB(G)+R(F)
      • P(c);XS(D)::QAB(G)+R(F)
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