MESON Chess Problem Database

Problem Display
PID: 189537 (8/KB6/QB6/P5p1/6R1/7p/2N1qP2/5k1r w - - 0 1)

van Dijk, Johannes

Tijdschrift vd NSB, 1911

8/KB6/QB6/P5p1/6R1/7p/2N1qP2/5k1r

#2

8 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qxa6+
      • 2.Bxa6#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Bxe2#
        • 2.Qxe2#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb5
        • 2.Qxb5#
      • 1...Qxa6+!
    • 1.f3?
      • 1...Qxa6+
        • 2.Bxa6#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb5
        • 2.Qxb5#
      • 1...Rg1
        • 2.Rxg1#
      • 1...Rh2
        • 2.Rg1#
      • 1...h2!
  • Keys
    • 1.f4!
      • 1...Qxa6+
        • 2.Bxa6#
      • 1...gxf4
        • 2.Rxf4#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb5
        • 2.Qxb5#
      • 1...Rg1
        • 2.Rxg1#
      • 1...Rh2
        • 2.Rg1#
      • 1...h2
        • 2.Bg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATEB::QAB(E),XQ(c)
    • Q(c);CHECK,N_SPINQ(c),OGATE,XQ(E)::B(H),XQ(c)
  • Tries
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);OGATEB::QAB(E),XQ(c)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(E)
    • Try
      • P(B);
      • Vars
        • Q(c);CHECK,N_SPINQ(c),OGATE,XQ(E)::B(H),XQ(c)
        • Q(c);OGATEB::QAB(E),XQ(c)
        • R(b);N_GUARD::R1(C),XR(b)
        • R(b);N_GUARD::R1(C)
      • Refutation
        • P(d);
  • Actual
    • P(B);
    • Vars
      • Q(c);CHECK,N_SPINQ(c),OGATE,XQ(E)::B(H),XQ(c)
      • P(e);OGATE,XP(B)::R(C),XP(e)
      • Q(c);OGATEB::QAB(E),XQ(c)
      • R(b);N_GUARD::R1(C),XR(b)
      • R(b);N_GUARD::R1(C)
      • P(d);N_GUARD::B(H)
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