MESON Chess Problem Database

Problem Display
PID: 249656 (BR6/2p5/K4p2/3n3q/pPk2rRr/2Pp4/PQ6/3N1b2 w - - 0 1)

Kirillov, Valery Afanasievich

5th HM., Schach-Aktiv, 1994

BR6/2p5/K4p2/3n3q/pPk2rRr/2Pp4/PQ6/3N1b2

#2

9 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc3
      • 2.Qxc3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sxb4+
      • 2.Qxb4#
    • 1...Sb6
      • 2.Se3#
    • 1...Se7
      • 2.Se3#
    • 1...a3
      • 2.Qb3#
  • Tries
    • 1.Bxd5+?
      • 1...Qxd5
        • 2.Se3#
      • 1...Kxd5!
    • 1.Bc6?
      • threat
        • 2.Bb5#
      • 1...Sxb4+
        • 2.Qxb4#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sb6
        • 2.Se3#
      • 1...Se7
        • 2.Se3#
      • 1...Qe8!
    • 1.Rxf4+?
      • 1...Sxf4
        • 2.Se3#
      • 1...Rxf4!
    • 1.Rb5?
      • threat
        • 2.Rc5#
      • 1...Sxb4+
        • 2.Qxb4#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sb6
        • 2.Se3#
      • 1...Se7
        • 2.Se3#
      • 1...c5
        • 2.Rxc5#
      • 1...d2!
    • 1.Qa3?
      • threat
        • 2.Sb2#
      • 1...Sxb4+
        • 2.Qxb4#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Rh2!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qc5#
      • 1...Sxb4+
        • 2.Rxb4#
      • 1...Sxc3
        • 2.Sb2#
      • 1...d2
        • 2.Qxf1#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Se3
        • 2.Qxf4#
      • 1...Sb6
        • 2.Qxf4#
      • 1...Se7
        • 2.Qxf4#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(g);OGATE,XP(D)::QAR1(C),XS(g)
    • S(g);N_GUARD::S(A),XS(g)
    • S(g);CHECK,OGATE,XP(E)::QAR1(C),XS(g)
    • S(g);N_GUARD::S(A)
    • P(c);N_GUARD::QAB1(C)
  • Tries
    • Try
      • B(H);CHECK,XS(g)
      • Vars
        • Q(h);XB(H)::S(A)
      • Refutation
        • K(d);N_SPINR(e),S_FLIGHT,XB(H)
    • Try
      • B(H);
      • Threat
        • B(H)
      • Vars
        • S(g);CHECK,OGATE,XP(E)::QAR1(C),XS(g)
        • S(g);OGATE,XP(D)::QAR1(C),XS(g)
        • S(g);N_GUARD::S(A),XS(g)
        • S(g);N_GUARD::S(A)
      • Refutation
        • Q(h);
    • Try
      • R(F);CHECK,XR(e)
      • Vars
        • S(g);XR(F)::S(A)
      • Refutation
        • R(f);XR(F)
    • Try
      • R(I);
      • Threat
        • R1(I)
      • Vars
        • S(g);CHECK,OGATE,XP(E)::QAR1(C),XS(g)
        • S(g);OGATE,XP(D)::QAR1(C),XS(g)
        • S(g);N_GUARD::S(A),XS(g)
        • S(g);N_GUARD::S(A)
        • P(j);::R1(I),XP(j)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • S(A)
      • Vars
        • S(g);CHECK,OGATE,XP(E)::QAR1(C),XS(g)
        • S(g);OGATE,XP(D)::QAR1(C),XS(g)
      • Refutation
        • R(f);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • S(g);CHECK,OGATE,XP(E)::R1(I),XS(g)
      • S(g);SBLOCK,XP(D)::S(A)
      • P(b);OGATEB::QAB(C),XB(a)
      • R(e);N_GUARD::QAR1(C),XR(e)
      • S(g);N_GUARD::QAR(C),XR(e)
      • P(j);::QAR1(C),XP(j)
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