MESON Chess Problem Database

Problem Display
PID: 240504 (3Q4/3p4/3p4/1NkP4/P2nK3/nP6/2N5/2R5 w - - 0 1)

Pilchenko, Viacheslav Karlovich

idee & form, 1993

3Q4/3p4/3p4/1NkP4/P2nK3/nP6/2N5/2R5

#2

8 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.b4#
    • 1...Se2
      • 2.Qc7#
    • 1...Sxb3
      • 2.Qc7#
    • 1...Sf3
      • 2.Qc7#
    • 1...Sf5
      • 2.Qc7#
  • Tries
    • 1.Se1+?
      • 1...Sac2
        • 2.Sd3#
      • 1...Sc4
        • 2.Sd3#
        • 2.Rxc4#
      • 1...Sdc2
        • 2.Sd3#
      • 1...Kb4!
    • 1.Sb4+?
      • 1...Sac2
        • 2.Sd3#
        • 2.Sa6#
      • 1...Sc4
        • 2.Sd3#
        • 2.Sa6#
        • 2.Rxc4#
      • 1...Sdc2
        • 2.Sd3#
        • 2.Sa6#
      • 1...Kxb4!
    • 1.Sbxa3?
      • threat
        • 2.b4#
      • 1...Sxc2
        • 2.Qa5#
      • 1...Sxb3
        • 2.Qc7#
      • 1...Sc6!
    • 1.Sbxd4?
      • threat
        • 2.Qc7#
      • 1...Sxc2
        • 2.Qa5#
      • 1...Sb5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qa7#
      • 1...Saxc2
        • 2.Sxd4#
      • 1...Saxb5
        • 2.Sxd4#
      • 1...Sdxc2
        • 2.Sxa3#
      • 1...Sxb3
        • 2.Qc7#
      • 1...Sdxb5
        • 2.Sxa3#
      • 1...Sc4
        • 2.b4#
      • 1...Sc6
        • 2.Scxa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(a);SBLOCK::P(C)
    • S(b);N_GUARD::QAR2(H)
    • S(b);N_GUARD,XP(C)::QAR2(H)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(B)
        • S(b);P_SPINS(b)::S(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(B);CHECK
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • S(F);XS(a)
      • Threat
        • P(C)
      • Vars
        • S(b);N_GUARD,P_SPINS(b),XS(B)::QAR2(H)
        • S(b);N_GUARD,XP(C)::QAR2(H)
      • Refutation
        • S(b);
    • Try
      • S(F);XS(b)
      • Threat
        • QAR2(H)
      • Vars
        • S(a);N_GUARD,P_SPINS(a),XS(B)::QAR2(H)
      • Refutation
        • S(a);
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • S(a);N_GUARD,P_SPINS(a),XS(B)::QAR(H)+S(F),XS(b)
      • S(a);N_GUARD,P_SPINS(a),XS(F)::R(A)+S(B),XS(b)
      • S(b);N_GUARD,P_SPINS(b),XS(B)::QAR(H)+S(F),XS(a)
      • S(b);N_GUARD,XP(C)::QAR2(H)
      • S(b);N_GUARD,P_SPINS(b),XS(F)::R(A)+S(B),XS(a)
      • S(a);SBLOCK::P(C)
      • S(b);N_GUARD::R(A)+S(B),XS(a)
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