MESON Chess Problem Database

Problem Display
PID: 139595 (4R3/4bN2/1N2n3/r7/r1RBk1P1/1p2P3/b4pPq/3K1Q2 w - - 0 1)

Rothstein, Louis

Good Companions (February), 1923

4R3/4bN2/1N2n3/r7/r1RBk1P1/1p2P3/b4pPq/3K1Q2

#2

10 + 9

3391 Het Half Pin Thema 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Bb4
      • 2.Bc5#
    • 1...Bc5
      • 2.Sg5#
    • 1...Sf4
      • 2.Sd6#
    • 1...Sc5
      • 2.Sg5#
  • Keys
    • 1.Kd2!
      • threat
        • 2.Qd3#
      • 1...Bb4+
        • 2.Bc3#
      • 1...Qxg2
        • 2.Qxg2#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Sf4
        • 2.Sd6#
      • 1...Sc5
        • 2.Sg5#

There are these versions: 225313

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(i);P_SPINS(h),S_CUTR(e)::R(E)+B(F)
    • B(i);N_GUARD,P_SPINS(h),S_CUTR(g)::S(I)
    • S(h);P_SPINB(i),S_CUTQ(c)::S(I)
    • S(h);N_GUARD,P_SPINB(i),S_CUTR(g)::S(I)
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • B(i);CHECK,P_SPINS(h),S_CUTR(e)::R(E)+B(F)
      • Q(c);OGATE,XP(C)::QAB(B),XQ(c)
      • B(a);N_GUARD::QAB(B),XB(a)
      • S(h);P_SPINB(i),S_CUTQ(c)::S(I)
      • S(h);N_GUARD,P_SPINB(i),S_CUTR(g)::S(I)
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