MESON Chess Problem Database

Problem Display
PID: 69413 (8/2Q5/3P3B/2p2P2/3k3N/2N3Pb/KP2P3/8 w - - 0 1)

de Jong, Leonard Nicholaas

Tijdschrift vd NSB, 1897

8/2Q5/3P3B/2p2P2/3k3N/2N3Pb/KP2P3/8

#2

10 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bg7#
    • 1...c4
      • 2.Sf3#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Sf3#
        • 2.Qg7#
      • 1...Ke5
        • 2.Bg7#
      • 1...Bg2
        • 2.Qg7#
      • 1...Bg4
        • 2.Qg7#
      • 1...c4+!
    • 1.Be3+?
      • 1...Kc4
        • 2.Qxc5#
      • 1...Ke5
        • 2.Qe7#
      • 1...Kxe3!
    • 1.Qc6?
      • threat
        • 2.Qe4#
        • 2.Qd5#
      • 1...Kc4
        • 2.Qa4#
        • 2.Qe4#
      • 1...Ke5
        • 2.Bg7#
      • 1...Bxf5
        • 2.Qd5#
      • 1...c4
        • 2.Sf3#
        • 2.Qd5#
      • 1...Bg2!
    • 1.b3?
      • threat
        • 2.Qg7#
      • 1...Kxc3
        • 2.Qxc5#
      • 1...Ke5
        • 2.Bg7#
      • 1...c4!
  • Keys
    • 1.b4!
      • threat
        • 2.Qxc5#
      • 1...Kxc3
        • 2.Qxc5#
      • 1...Kc4
        • 2.Qxc5#
      • 1...Ke5
        • 2.Bg7#
      • 1...cxb4
        • 2.Sf3#
      • 1...c4
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(I)
    • P(c);::S(F)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::B(I)
        • B(a);::QAB(J)
      • Refutation
        • P(c);CHECK
    • Try
      • B(I);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(J),XP(c)
        • K(b);S_FLIGHT::QAR2(J)
      • Refutation
        • K(b);S_FLIGHT,XB(I)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::B(I)
        • B(a);XP(G)::QAR1(J)
      • Refutation
        • B(a);
    • Try
      • P(B);
      • Threat
        • QAB(J)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT,XS(D)::QAR2(J),XP(c)
        • K(b);S_FLIGHT::B(I)
      • Refutation
        • P(c);
  • Actual
    • P(B);
    • Threat
      • QAB1(J),XP(c)
    • Vars
      • K(b);P_SPINP(c),S_FLIGHT,XS(D)::QAR2(J),XP(c)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR1(J),XP(c)
      • K(b);S_FLIGHT::B(I)
      • P(c);XP(B)::S(F)
      • P(c);SBLOCK::QAB(J)
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