MESON Chess Problem Database

Problem Display
PID: 81431 (2nb4/1K6/1pRpR3/1p1p3p/bN1k3r/r3p2Q/8/8 w - - 0 1)

Casa, Alex

British Chess Magazine, 1953

2nb4/1K6/1pRpR3/1p1p3p/bN1k3r/r3p2Q/8/8

#2

5 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxe3#
    • 1...Ra2
      • 2.Qxe3#
    • 1...Bb3
      • 2.Qxe3#
    • 1...Bc7
      • 2.Qxh4#
    • 1...Se7
      • 2.Qxh4#
  • Tries
    • 1.Sc2+?
      • 1...Kd3
        • 2.Qxe3#
      • 1...Bxc2!
    • 1.Qg2?
      • threat
        • 2.Qxd5#
      • 1...Bb3
        • 2.Qb2#
      • 1...Se7
        • 2.Qg7#
      • 1...Re4!
    • 1.Qf3?
      • threat
        • 2.Qxd5#
      • 1...Bb3
        • 2.Qxe3#
      • 1...Se7
        • 2.Qf6#
      • 1...Re4!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qxd5#
      • 1...Bb3
        • 2.Qd3#
      • 1...Se7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::QAB1(A),XP(b)
    • B(c);S_CUTR(a)::QAB1(A),XP(b)
    • B(l);N_GUARD::QAR(A),XR(e)
    • S(k);S_CUTB(l)::QAR(A),XR(e)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b)::QAR1(A),XP(b)
      • Refutation
        • B(c);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(g)
      • Vars
        • B(c);S_CUTR(a)::QAB(A)
        • S(k);S_CUTB(l)::QAB(A)
      • Refutation
        • R(e);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(g)
      • Vars
        • B(c);S_CUTR(a)::QAB1(A),XP(b)
        • S(k);S_CUTB(l)::QAB(A)
      • Refutation
        • R(e);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(g)
    • Vars
      • B(c);S_CUTR(a)::QAR1(A)
      • S(k);S_CUTB(l)::QAB(A)
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