MESON Chess Problem Database

Problem Display
PID: 18324 (K1k3b1/R3pn2/2r1r1N1/B4Q2/1b6/8/8/8 w - - 0 1)

Lipton, Michael

Al Hamishmar, 1955

K1k3b1/R3pn2/2r1r1N1/B4Q2/1b6/8/8/8

#2

5 + 7

3174 The Two-move Chess Problem Tradition and Development 1966
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qxe6#
    • 1...Rc2
      • 2.Qxe6#
    • 1...Rc3
      • 2.Qxe6#
    • 1...Rc4
      • 2.Qxe6#
    • 1...Rc5
      • 2.Sxe7#
      • 2.Qxe6#
    • 1...Rd6
      • 2.Sxe7#
    • 1...Be1
      • 2.Sxe7#
    • 1...Bd2
      • 2.Sxe7#
    • 1...Bc3
      • 2.Sxe7#
    • 1...Bd6
      • 2.Qxe6#
    • 1...Se5
      • 2.Qf8#
    • 1...Sg5
      • 2.Qf8#
    • 1...Sd6
      • 2.Sxe7#
    • 1...Sh6
      • 2.Qf8#
    • 1...Sh8
      • 2.Qf8#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qb7#
        • 2.Qb8#
      • 1...Bxa5
        • 2.Qb8#
      • 1...Rb6
        • 2.Qd7#
      • 1...Bd6
        • 2.Qb7#
      • 1...Sd6
        • 2.Qxc6#
        • 2.Qb8#
      • 1...Sd8
        • 2.Qb8#
      • 1...Rc7!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qd7#
      • 1...Rcd6
        • 2.Qb7#
      • 1...Rc7
        • 2.Rxc7#
      • 1...Red6
        • 2.Sxe7#
      • 1...Bd6
        • 2.Qxe6#
      • 1...Se5
        • 2.Qd8#
      • 1...Sd6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(b);N_GUARD::QAB(B),XR(c)
    • R(b);S_CUTB(a)::S(C),XP(d)
    • B(a);N_GUARD::S(C),XP(d)
    • B(a);S_CUTR(b)::QAB(B),XR(c)
    • S(e);OGATE::QAR(B)
    • S(e);S_CUTB(a)::S(C),XP(d)
  • Tries
    • Try
      • Q(B);N_PINR(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XB(A)::QAR1(B)
        • R(b);OGATE::QAB1(B)
        • B(a);::QAB1(B)
        • S(e);::QAR1(B)
      • Refutation
        • R(b);
  • Actual
    • Q(B);N_PINR(c)
    • Threat
      • QAB1(B)
    • Vars
      • R(b);OGATE::QAB1(B)
      • R(b);N_GUARD::R1(D),XR(b)
      • R(c);N_GUARD,S_CUTB(a)::S(C),XP(d)
      • B(a);S_CUTR(b)::QAB(B),XR(c)
      • S(e);N_GUARD::QAR1(B)
      • S(e);S_CUTR(c)::QAR2(B),XR(b)
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