MESON Chess Problem Database

Problem Display
PID: 108662 (1B2n3/r1p4p/R2r1p1N/1p2kP1p/n4N2/3pPB2/3K4/1Q6 w - - 0 1)

Koch, Janos

Szerkeszti temaverseny, 1952

1B2n3/r1p4p/R2r1p1N/1p2kP1p/n4N2/3pPB2/3K4/1Q6

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Re6#
    • 1...Rd5
      • 2.Re6#
    • 1...Re6
      • 2.Sxd3#
      • 2.Rxe6#
    • 1...Rd7
      • 2.Re6#
    • 1...Rd8
      • 2.Re6#
    • 1...c5
      • 2.Sxd3#
    • 1...c6
      • 2.Sxd3#
  • Tries
    • 1.Rxd6?
      • threat
        • 2.Rd5#
        • 2.Re6#
      • 1...Sxd6
        • 2.Sxd3#
      • 1...cxd6
        • 2.Sxd3#
      • 1...Ra6
        • 2.Rd5#
      • 1...Sc3
        • 2.Re6#
      • 1...Sc5
        • 2.Rd5#
      • 1...Sb6
        • 2.Re6#
      • 1...Sg7
        • 2.Rd5#
      • 1...Kxd6!
    • 1.Qxb5+?
      • 1...Rd5
        • 2.Sxd3#
        • 2.Re6#
        • 2.Qxe8#
        • 2.Qxd5#
      • 1...c5
        • 2.Sxd3#
      • 1...Sc5!
  • Keys
    • 1.Qxd3!
      • threat
        • 2.Sf7#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Rd7
        • 2.Re6#
      • 1...c5
        • 2.Qd5#
      • 1...c6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(f);OGATE,P_SPINP(i)::R1(G)
    • P(i);P_SPINR(f)::S(E),XP(a)
  • Tries
    • Try
      • R(G);XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(k);SBLOCK,XR(G)::S(E),XP(a)
        • P(i);P_SPINP(i),XR(G)::S(E),XP(a)
        • R(h);::R1(G)
        • S(b);::R1(G)
        • S(k);::R1(G)
      • Refutation
        • K(d);P_SPINP(i),S_FLIGHT,XR(G)
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • P(i);P_SPINP(i),P_SPINR(f)::S(E),XP(a)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • Q(A);P_SPINQ(A),XP(a)
    • Threat
      • S(H)
    • Vars
      • R(f);CHECK,P_SPINP(i),XQ(A)::S(E),XR(f)
      • R(f);OGATE,P_SPINP(i)::R1(G)
      • P(i);P_SPINR(f)::QAR1(A)
      • P(i);P_SPINR(f)::QAB1(A)
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