MESON Chess Problem Database

Problem Display
PID: 19138 (5r2/3PR1p1/1B2B3/1K2N3/1pP1kP1R/1r5p/2P1p3/2b2Nn1 w - - 0 1)

Persson, Hol Holger

Mora Tidning, 1932

5r2/3PR1p1/1B2B3/1K2N3/1pP1kP1R/1r5p/2P1p3/2b2Nn1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sg3#
    • 1...Rb2
      • 2.Sg3#
    • 1...Rd3
      • 2.cxd3#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rf5
      • 2.Bd5#
    • 1...Bb2
      • 2.Sd2#
    • 1...Bd2
      • 2.Sxd2#
    • 1...Ba3
      • 2.Sd2#
    • 1...Be3
      • 2.Sg3#
    • 1...Sf3
      • 2.Sg3#
  • Tries
    • 1.d8Q?
      • threat
        • 2.Qd4#
        • 2.Qd5#
      • 1...Rd3
        • 2.Qxd3#
        • 2.cxd3#
      • 1...Bb2
        • 2.Sd2#
        • 2.Qd5#
      • 1...Be3
        • 2.Sg3#
        • 2.Qd5#
      • 1...Sf3
        • 2.Sg3#
        • 2.Qd5#
      • 1...Rxd8!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sg5#
      • 1...Rf5+
        • 2.Bd5#
      • 1...Kxf3
        • 2.Bd5#
      • 1...Rxf3
        • 2.Bxh3#
      • 1...Rxf4
        • 2.Bg4#
      • 1...Bxf4
        • 2.S1d2#
      • 1...Sxf3
        • 2.Sg3#
      • 1...g5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(d);N_GUARD::S(A)
    • R(d);OGATE::P(B),XR(d)
    • R(d);N_GUARD::S(A),XR(d)
    • R(i);P_PINS(G),SBLOCK::B(I)
    • B(a);N_GUARD::S(A)
    • B(a);N_GUARD::S(A),XB(a)
    • B(a);S_CUTR(d)::S(A)
    • S(b);S_CUTR(d)::S(A)
  • Tries
    • Try
      • P(J);
      • Threat
        • DUALS(2)
      • Refutation
        • R(i);XQ(J)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • R(i);CHECK,SBLOCK::R(K)+B(I),DCHECK
      • K(g);S_FLIGHT,XS(G)::B(I)
      • R(d);SBLOCK,XS(G)::R(K)+B(I),XP(e)
      • R(i);P_SPINR(i),SBLOCK,XP(D)::R(K)+B(I)
      • B(a);N_GUARD,P_SPINB(a),XP(D)::S(A)
      • S(b);SBLOCK,XS(G)::S(A)
      • P(h);::S(G),XP(h)
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