MESON Chess Problem Database

Problem Display
PID: 138057 (4bb2/2Q4B/4R3/2n3R1/Pnk2P1K/1pP1pN2/3r1p2/3N4 w - - 0 1)

Kozlov, Aleksandr Ivanovich

3rd Prize, Kubbel MT, 1945-1946

4bb2/2Q4B/4R3/2n3R1/Pnk2P1K/1pP1pN2/3r1p2/3N4

#2

10 + 9

14752 Soviet Chess Compositions (1945-1947) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Rxc5#
      • 2.Qxc5#
    • 1...Bh6
      • 2.Rxc5#
      • 2.Qxc5#
    • 1...Bg7
      • 2.Rxc5#
      • 2.Qxc5#
    • 1...Sd3
      • 2.Re4#
    • 1...Sd5
      • 2.Se5#
    • 1...e2
      • 2.Sxd2#
  • Tries
    • 1.Re4+?
      • 1...Rd4
        • 2.Rxd4#
      • 1...Kd3!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qxb4#
      • 1...Sxa4
        • 2.Se5#
      • 1...Sxe6
        • 2.Se5#
      • 1...Bg6
        • 2.Qb5#
      • 1...Se4
        • 2.Se5#
      • 1...Sa2
        • 2.Sxe3#
      • 1...Sc2
        • 2.Sb2#
      • 1...Sbd3
        • 2.Sxe3#
      • 1...Sd5
        • 2.Se5#
      • 1...Sba6
        • 2.Sxe3#
      • 1...Sc6
        • 2.Sxe3#
        • 2.Qb5#
      • 1...Scd3
        • 2.Re4#
      • 1...Sca6
        • 2.Se5#
      • 1...Sb7
        • 2.Se5#
      • 1...Sd7
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • S(e);SBLOCK,S_CUTR(a)::R(H)
    • S(e);SBLOCK::S(C)
    • P(d);N_GUARD::S(C),XR(a)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R1(H),XR(a)
      • Refutation
        • K(f);N_SPINS(g),S_FLIGHT
  • Actual
    • Q(I);N_PINS(g)
    • Threat
      • QAR1(I),XS(e)
    • Vars
      • S(g);XP(D)::S(C)
      • S(g);XR(H)::S(C)
      • B(h);N_GUARD::QAB1(I)
      • S(g);::S(C)
      • S(e);::S(A),XP(d)
      • S(e);S_CUTR(a)::S(A)
      • S(e);SBLOCK::S(C)
      • S(g);N_GUARD,SBLOCK,S_CUTR(a)::R(H)
      • S(g);S_CUTB(h)::QAB1(I)
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