MESON Chess Problem Database

Problem Display
PID: 107094 (2K5/5b2/p2PP1p1/2k5/2NN3Q/3p2P1/5r2/1RR2nBB w - - 0 1)

Kriuckov, Sergey Petrovic

3rd Prize, V. Ts. P. S. Chess Club, 1938

2K5/5b2/p2PP1p1/2k5/2NN3Q/3p2P1/5r2/1RR2nBB

#2

11 + 7

6490 yacpdb 2009
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qg5#
    • 1...Rd2
      • 2.Qg5#
    • 1...Rg2
      • 2.Qg5#
    • 1...Rh2
      • 2.Qg5#
    • 1...Bxe6+
      • 2.Sxe6#
    • 1...a5
      • 2.Rb5#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Qg5#
        • 2.Qd4#
      • 1...Sxg3
        • 2.Bxf2#
        • 2.Qd4#
      • 1...Se3
        • 2.Qd4#
      • 1...g5
        • 2.Qxg5#
        • 2.Qd4#
      • 1...Bxe6+!
    • 1.Bxf2?
      • threat
        • 2.Qg5#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Sxg3
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
      • 1...g5
        • 2.Qxg5#
      • 1...Se3!
    • 1.Qg5+?
      • 1...Kxd4
        • 2.Qd5#
        • 2.Qe5#
      • 1...Rf5!
    • 1.Qd8?
      • threat
        • 2.Qb6#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Kxd4
        • 2.Qb6#
      • 1...Rc2
        • 2.Qc7#
      • 1...Rg2
        • 2.Qa5#
        • 2.Qg5#
      • 1...Rf3
        • 2.Sb6#
        • 2.Qa5#
      • 1...Rb2!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qa7#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Kxd4
        • 2.Qa7#
      • 1...Rc2
        • 2.Qc7#
      • 1...Rb2
        • 2.d7#
      • 1...Rg2
        • 2.Qg5#
      • 1...Rf3
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::QAR(H)
    • B(g);CHECK,XP(J)::S(G),XB(g)
    • P(e);N_GUARD::R1(A)
  • Tries
    • Try
      • S(G);P_PINR(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_SPINR(b)::QAB1(H)
      • Refutation
        • B(g);CHECK,XP(J)
    • Try
      • B(C);XR(b)
      • Threat
        • QAR(H)
      • Vars
        • B(g);CHECK,XP(J)::B(C)+S(G),DCHECK,XB(g)
        • P(f);::QAR(H),XP(f)
      • Refutation
        • S(a);
    • Try
      • Q(H);CHECK
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • B(g);CHECK,XP(J)::S(G),XB(g)
        • K(d);P_SPINR(b),S_FLIGHT,XS(G)::QAB(H)
        • R(b);::QAR2(H)
      • Refutation
        • R(b);
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • B(g);CHECK,XP(J)::S(G),XB(g)
      • K(d);P_SPINR(b),S_FLIGHT,XS(G)::QAB(H)
      • R(b);::QAR2(H)
      • R(b);::QAB(H)+P(I)
      • R(b);N_GUARD::QAR(H)
      • R(b);N_GUARD::R(B)+S(F)
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