MESON Chess Problem Database

Problem Display
PID: 109524 (5n2/7r/2Q5/4pp1p/4Nk2/5PRK/3PPrp1/3n2b1 w - - 0 1)

Tolstoy, Stanislav Maksimovic

Canadian Chess Chat, 1981

5n2/7r/2Q5/4pp1p/4Nk2/5PRK/3PPrp1/3n2b1

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Rxf3#
    • 1...Rh6
      • 2.Qxh6#
    • 1...Ra7
      • 2.Qh6#
    • 1...Rb7
      • 2.Qh6#
    • 1...Rc7
      • 2.Qh6#
    • 1...Rd7
      • 2.Qh6#
    • 1...Re7
      • 2.Qh6#
    • 1...Rf7
      • 2.Qh6#
    • 1...Sb2
      • 2.e3#
    • 1...Sc3
      • 2.e3#
    • 1...fxe4
      • 2.Qxe4#
      • 2.Qf6#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sd5#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...Sxc3
        • 2.e3#
      • 1...e4
        • 2.Qd6#
      • 1...Rd7
        • 2.Qh6#
      • 1...Se3!
    • 1.Sf6?
      • threat
        • 2.Sd5#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...e4
        • 2.Qd6#
      • 1...Rd7
        • 2.Sxh5#
      • 1...Sc3
        • 2.e3#
      • 1...Se3!
    • 1.Qf6?
      • threat
        • 2.Qh4#
        • 2.Qg5#
      • 1...Rxf3
        • 2.Qh4#
      • 1...Se3
        • 2.Qg5#
      • 1...Se6
        • 2.Qh4#
      • 1...Sg6
        • 2.Qg5#
      • 1...h4
        • 2.Rg4#
        • 2.Qg5#
      • 1...Rg7!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sd3#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...e4
        • 2.Qd6#
      • 1...Rd7
        • 2.Qh6#
      • 1...Sb2
        • 2.e3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(c);OGATE,P_PINR(D),XP(C)::R1(D),XR(c)
    • R(i);N_GUARD::QAB(G),XR(i)
    • R(i);N_GUARD::QAB(G)
    • S(a);N_GUARD::P(B)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(c);OGATE,P_PINR(D),XP(C)::QAR1(G),XR(c)
        • S(a);N_GUARD,XS(F)::P(B)
        • P(f);OGATEB::QAB(G)
        • R(i);N_GUARD::QAB(G)
      • Refutation
        • S(a);
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(c);OGATE,P_PINR(D),XP(C)::QAR1(G),XR(c)
        • P(f);OGATEB::QAB(G)
        • R(i);N_GUARD::S(F),XP(h)
        • S(a);N_GUARD::P(B)
      • Refutation
        • S(a);
    • Try
      • Q(G);P_PINP(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);P_PINR(D),XP(C)::QAR2(G)
        • S(a);::QAB1(G)
        • S(j);::QAR2(G)
        • S(j);::QAB1(G)
      • Refutation
        • R(i);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • R(c);OGATE,P_PINR(D),XP(C)::QAR1(G),XR(c)
      • P(f);OGATEB::QAB(G)
      • R(i);N_GUARD::QAB(G)
      • S(a);N_GUARD::P(B)
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