MESON Chess Problem Database

Problem Display
PID: 238808 (5Rq1/2B5/7n/4ppPP/4Nk2/2PR3P/6QP/2bB2nK w - - 0 1)

Janevski, Zivko

Schach-Aktiv, 2011

5Rq1/2B5/7n/4ppPP/4Nk2/2PR3P/6QP/2bB2nK

#2

12 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sxh3
      • 2.Qf3#
    • 1...Sg4
      • 2.Qxg4#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qg3#
      • 1...Qxg5
        • 2.Qe4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Se2
        • 2.Rf3#
      • 1...Qd5!
    • 1.Sc5?
      • threat
        • 2.Qg3#
      • 1...Qxg5
        • 2.Se6#
        • 2.Qe4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Se2
        • 2.Rf3#
      • 1...Qd5!
    • 1.Sd6?
      • threat
        • 2.Qg3#
      • 1...Qxg5
        • 2.Qe4#
      • 1...Sg4
        • 2.Rxf5#
        • 2.Qxg4#
      • 1...Se2
        • 2.Rf3#
      • 1...Qd5!
    • 1.Sf6?
      • threat
        • 2.Qg3#
      • 1...Qxg5
        • 2.Sd5#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Se2
        • 2.Rf3#
      • 1...Sg4!
    • 1.Bf3?
      • threat
        • 2.Qg3#
      • 1...Qxg5
        • 2.Qxg5#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Se2!
    • 1.Rf3+?
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Kxe4!
    • 1.Rxf5+?
      • 1...Sxf5
        • 2.Qg4#
      • 1...Kxf5!
    • 1.Qf1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Kxe4!
    • 1.Qf2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Kxe4!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Qg3#
      • 1...Ke3
        • 2.Qf2#
      • 1...Qxg5
        • 2.Qxg5#
      • 1...Se2
        • 2.Qf2#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
    • S(b);N_GUARD,XP(G)::QAR1(C)
    • S(f);N_GUARD::QAR1(C),XS(f)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAB1(C)
      • Vars
        • Q(g);SBLOCK,XP(I)::QAR1(C)
        • S(f);N_GUARD::QAR1(C),XS(f)
        • S(b);N_GUARD::R1(F)
      • Refutation
        • Q(g);P_PINQ(C)
    • Try
      • S(H);
      • Threat
        • QAB1(C)
      • Vars
        • S(f);N_GUARD::QAR1(C),XS(f)
        • S(b);N_GUARD::R1(F)
      • Refutation
        • Q(g);P_PINQ(C)
    • Try
      • S(H);N_PINP(d),P_PINP(e)
      • Threat
        • QAB1(C)
      • Vars
        • Q(g);SBLOCK,XP(I)::QAR1(C)
        • S(b);N_GUARD::R1(F)
      • Refutation
        • Q(g);P_PINQ(C)
    • Try
      • S(H);
      • Threat
        • QAB1(C)
      • Vars
        • Q(g);N_GUARD,XP(I)::S(H)
        • Q(g);N_GUARD,P_PINQ(C)::S(H),XQ(g)
        • S(b);N_GUARD::R1(F)
      • Refutation
        • S(f);
    • Try
      • B(A);
      • Threat
        • QAB1(C)
      • Vars
        • Q(g);OGATE,XP(I)::QAB1(C),XQ(g)
        • S(b);OGATE,XB(A)::QAR1(C),XS(b)
      • Refutation
        • S(b);
    • Try
      • R(F);CHECK
      • Vars
        • S(b);OGATE,XR(F)::QAR1(C),XS(b)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT,XS(H)
    • Try
      • R(L);CHECK,XP(e)
      • Vars
        • S(f);XR(L)::QAR1(C)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT,XR(L)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(C),XS(b)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT,XS(H)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(C),XS(b)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT,XS(H)
  • Actual
    • R(F);
    • Threat
      • QAB1(C)
    • Vars
      • K(c);N_SPINP(d),S_FLIGHT::QAB1(C)
      • Q(g);OGATE,XP(I)::QAB1(C),XQ(g)
      • S(b);N_GUARD::QAR2(C)
      • S(b);N_GUARD::QAR1(C),XS(b)
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