MESON Chess Problem Database

Problem Display
PID: 158618 (8/1r1nR1K1/3pNpB1/1P1k4/2N5/1PPp1r2/Q7/8 w - - 0 1)

Alaikov, Venelin

Probleemblad, 1967

8/1r1nR1K1/3pNpB1/1P1k4/2N5/1PPp1r2/Q7/8

#2

9 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Sc7+?
      • 1...Kc5
        • 2.Qa3#
        • 2.b4#
      • 1...Rxc7!
    • 1.Qa6?
      • threat
        • 2.Qxb7#
        • 2.Qc6#
        • 2.Qxd6#
      • 1...Rxb5
        • 2.Qxd6#
      • 1...Rf5
        • 2.Qxb7#
        • 2.Qc6#
      • 1...f5
        • 2.Qxb7#
        • 2.Qc6#
      • 1...Ra7
        • 2.Qc6#
        • 2.Qxd6#
      • 1...Rc7
        • 2.Qxd6#
      • 1...Rb8
        • 2.Qc6#
        • 2.Qxd6#
      • 1...Sc5
        • 2.Qc6#
        • 2.Qxd6#
      • 1...Se5
        • 2.Qxd6#
      • 1...Sb6
        • 2.Qxb7#
      • 1...Sb8
        • 2.Qxd6#
      • 1...Rb6!
    • 1.Qa8?
      • threat
        • 2.Qxb7#
      • 1...Sc5
        • 2.Sc7#
      • 1...Se5
        • 2.Sb6#
      • 1...Sb8!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qxf3#
      • 1...Sc5
        • 2.Sf4#
      • 1...Se5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • R(f);XS(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • R(f);XP(E)::QAR1(A),XP(d)
        • R(f);::QAR1(A),XP(d)
        • S(g);P_PINR(H)::QAR1(A),XP(d)
        • S(g);P_PINR(H)::QAB(A),XR(f)
      • Refutation
        • R(f);
    • Try
      • Q(A);P_PINR(f)
      • Threat
        • QAB(A),XR(f)
      • Vars
        • S(g);P_PINR(H),SBLOCK::S(F)
        • S(g);N_GUARD,P_PINR(H),SBLOCK::S(D)
      • Refutation
        • S(g);P_PINR(H)
  • Actual
    • Q(A);P_PINR(b)
    • Threat
      • QAB(A),XR(b)
    • Vars
      • S(g);P_PINR(H),SBLOCK::S(F)
      • S(g);P_PINR(H),SBLOCK::S(D)
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