MESON Chess Problem Database

Problem Display
PID: 146800 (b7/1Qb5/2rpK3/3rp3/4k3/4P3/4P3/3NnN1n w - - 0 1)

Moutecidis, Pavlos

Sorokin, Evgeny Pavlovich

Canadian Chess Chat, 1983

b7/1Qb5/2rpK3/3rp3/4k3/4P3/4P3/3NnN1n

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Sc3#
      • 2.Sxd2#
    • 1...Rd4
      • 2.Sc3#
    • 1...Ra5
      • 2.Sc3#
      • 2.Sd2#
    • 1...Rb5
      • 2.Sc3#
      • 2.Sd2#
    • 1...Rdc5
      • 2.Sd2#
    • 1...Rc1
      • 2.Sd2#
    • 1...Rc3
      • 2.Sxc3#
      • 2.Sd2#
    • 1...Rc4
      • 2.Sd2#
    • 1...Rcc5
      • 2.Sd2#
    • 1...Ra6
      • 2.Sc3#
      • 2.Sd2#
    • 1...Rb6
      • 2.Sc3#
      • 2.Sd2#
    • 1...Ba5
      • 2.Qh7#
    • 1...Bb6
      • 2.Qh7#
    • 1...Bb8
      • 2.Qh7#
    • 1...Bd8
      • 2.Qh7#
    • 1...Sd3
      • 2.Sd2#
    • 1...Sf2
      • 2.Sxf2#
      • 2.Sg3#
    • 1...Sg3
      • 2.Sf2#
      • 2.Sxg3#
  • Tries
    • 1.Qxc6?
      • threat
        • 2.Sc3#
        • 2.Sd2#
      • 1...Bxc6
        • 2.Sc3#
      • 1...Sf3
        • 2.Sc3#
      • 1...Ba5!
    • 1.Qb1+?
      • 1...Rd3
        • 2.Sd2#
      • 1...Rc2
        • 2.Sc3#
      • 1...Sd3
        • 2.Sd2#
      • 1...Sc2!
    • 1.Qxc7?
      • threat
        • 2.Qh7#
      • 1...Sg3
        • 2.Sf2#
        • 2.Sxg3#
      • 1...Rxc7!
  • Keys
    • 1.Qb4+!
      • 1...Rd4
        • 2.Sd2#
      • 1...Rc4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • R(d);P_SPINR(f)::S(A)
    • R(d);N_GUARD,P_SPINR(f)::S(B)
    • R(f);P_SPINR(d)::S(B)
    • B(h);OGATE::QAB(F)
    • S(a);S_CUTR(d)::S(B)
  • Tries
    • Try
      • Q(F);P_PINR(d),XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(i);N_SPINR(d),XQ(F)::S(A)
        • S(a);::S(A)
      • Refutation
        • B(h);
    • Try
      • Q(F);CHECK
      • Vars
        • R(d);P_SPINR(d)::S(B)
        • R(f);P_SPINR(f)::S(A)
        • S(a);P_SPINS(a)::S(B)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(F);XB(h)
      • Threat
        • QAB(F)
      • Refutation
        • R(f);XQ(F)
  • Actual
    • Q(F);CHECK
    • Vars
      • R(d);P_SPINR(d)::S(B)
      • R(f);P_SPINR(f)::S(A)
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