MESON Chess Problem Database

Problem Display
PID: 86432 (8/1K6/8/1P1PPP2/2knNPQ1/3R4/2P5/1NR1B3 w - - 0 1)

Rudenko, Valentin Fedorovich

CSTV, 1973

8/1K6/8/1P1PPP2/2knNPQ1/3R4/2P5/1NR1B3

#2

13 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Sa3#
    • 1...Sb3
      • 2.Sa3#
    • 1...Sf3
      • 2.Sa3#
    • 1...Sxf5
      • 2.Sa3#
    • 1...Sc6
      • 2.Sa3#
    • 1...Se6
      • 2.Sa3#
  • Tries
    • 1.Rxd4+?
      • 1...Kxb5
        • 2.Sa3#
        • 2.Qe2#
      • 1...Kxd4!
    • 1.Qd1?
      • 1...Kxb5
        • 2.c4#
      • 1...Kxd5
        • 2.Rxd4#
      • 1...Sxc2
        • 2.Sa3#
      • 1...Sxf5
        • 2.Sa3#
      • 1...Se2
        • 2.Sa3#
      • 1...Sb3
        • 2.Sa3#
      • 1...Sf3
        • 2.Sa3#
      • 1...Sc6
        • 2.Sa3#
      • 1...Se6
        • 2.Sa3#
      • 1...Sxb5!
    • 1.Qg6?
      • 1...Kxb5
        • 2.Qa6#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Sxb5
        • 2.Qc6#
      • 1...Sxf5
        • 2.Sa3#
        • 2.Qc6#
      • 1...Se2
        • 2.Sa3#
        • 2.Qc6#
      • 1...Sb3
        • 2.Sa3#
      • 1...Sf3
        • 2.Sa3#
        • 2.Qc6#
      • 1...Sc6
        • 2.Sa3#
        • 2.Qxc6#
      • 1...Se6
        • 2.Sa3#
      • 1...Sxc2!
  • Keys
    • 1.Qe2!
      • 1...Kxb5
        • 2.Rxd4#
      • 1...Kxd5
        • 2.c4#
      • 1...Sxc2
        • 2.Sa3#
      • 1...Sxe2
        • 2.Sa3#
      • 1...Sxb5
        • 2.Rdd1#
      • 1...Sxf5
        • 2.Sa3#
        • 2.Rdd1#
      • 1...Sb3
        • 2.Sa3#
        • 2.Rdd1#
      • 1...Sf3
        • 2.Sa3#
        • 2.Rdd1#
      • 1...Sc6
        • 2.Sa3#
        • 2.Rdd1#
      • 1...Se6
        • 2.Sa3#
        • 2.Rdd1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(b);::S(A)
    • S(b);XP(L)::S(A)
  • Tries
    • Try
      • R(E);CHECK,XS(b)
      • Refutation
        • K(a);P-FLIGHT,XR(E)
    • Try
      • Q(H);
      • Vars
        • K(a);OGATE,S_FLIGHT,XP(I)::P(D)
        • K(a);P_SPINS(b),S_FLIGHT,XP(J)::R1(E),XS(b)
        • S(b);P_SPINS(b),XP(D)::S(A)
        • S(b);XP(L)::S(A)
        • S(b);::S(A)
      • Refutation
        • S(b);XP(I)
    • Try
      • Q(H);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(H)
        • K(a);P_SPINS(b),S_FLIGHT,XP(J)::QAB1(H)
        • S(b);N_GUARD,XP(I)::QAR2(H)
        • S(b);::S(A)
      • Refutation
        • S(b);P_SPINS(b),XP(D)
  • Actual
    • Q(H);
    • Vars
      • K(a);S_FLIGHT,XP(I)::QAB(H)+R(E),XS(b)
      • K(a);OGATE,P_SPINS(b),S_FLIGHT,XP(J)::P(D)
      • S(b);P_SPINS(b),XP(D)::S(A)
      • S(b);XQ(H)::S(A)
      • S(b);N_GUARD,SBLOCK,XP(I)::QAB(H)+R(E)
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