MESON Chess Problem Database

Problem Display
PID: 198320 (4b2K/1qPp2N1/N5P1/r2k1B1R/r2b1B2/3Rp3/4P3/2Q5 w - - 0 1)

van Dijk, Johannes

Comm., Western Daily Mercury, 1920

4b2K/1qPp2N1/N5P1/r2k1B1R/r2b1B2/3Rp3/4P3/2Q5

#2

11 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7
      • 2.Sxc7#
    • 1...Rc4
      • 2.Qh1#
    • 1...Rc5
      • 2.Qxc5#
    • 1...Bxg6
      • 2.Bxg6#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Bb1#
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Bxg6
        • 2.Bxg6#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Qb1
        • 2.Bxb1#
      • 1...Rc4!
    • 1.Rxd4+?
      • 1...Rxd4
        • 2.Bb1#
        • 2.Bd3#
      • 1...Kxd4!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Bb1#
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Bxg6
        • 2.Bxg6#
      • 1...exd2
        • 2.e4#
      • 1...Rc4
        • 2.Qh1#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Qb1
        • 2.Bxb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(f);XP(I)::S(G),XQ(f)
    • R(b);SBLOCK::QAB(A)
    • R(d);N_GUARD::QAR1(A),XR(d)
    • B(h);OGATE,XP(H)::R(F)+B(E),XB(h)
  • Tries
    • Try
      • R(C);
      • Threat
        • R(F)+B(E)
      • Vars
        • Q(f);XP(I)::S(G),XQ(f)
        • B(h);OGATE,XP(H)::R(F)+B(E),XB(h)
        • R(d);N_GUARD::QAR1(A),XR(d)
        • Q(f);::R(F)+B(E),XQ(f)
      • Refutation
        • R(b);
    • Try
      • R(C);CHECK,N_SPINS(J),XB(c)
      • Refutation
        • K(e);P-FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • R(F)+B(E)
    • Vars
      • Q(f);XP(I)::S(G),XQ(f)
      • B(h);OGATE,XP(H)::R(F)+B(E),XB(h)
      • P(a);N_SPINB(c),OGATE,XR(C)::P(B)
      • R(b);SBLOCK::QAB(A)
      • R(d);N_GUARD::QAR1(A),XR(d)
      • Q(f);::R(F)+B(E),XQ(f)
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