MESON Chess Problem Database

Problem Display
PID: 9505 (1n2N3/8/nQP1p3/P3k2r/b3B1R1/5R1P/rP3PK1/8 w - - 0 1)

van Dijk, Johannes

HM., Sydney Morning Herald, 1904

1n2N3/8/nQP1p3/P3k2r/b3B1R1/5R1P/rP3PK1/8

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.Qxb2#
    • 1...Sc5
      • 2.Qxc5#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Qd4#
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qc7#
        • 2.Qxb8#
      • 1...Sxc6!
    • 1.Rg5+?
      • 1...Kxe4
        • 2.Sd6#
        • 2.Sf6#
        • 2.Qe3#
      • 1...Rxg5+!
    • 1.Qe3?
      • threat
        • 2.Qc3#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Ra3!
    • 1.Qd8?
      • threat
        • 2.Qf6#
        • 2.Qd6#
      • 1...Rf5
        • 2.Qd6#
      • 1...Rh6
        • 2.Qd6#
      • 1...Sd7!
    • 1.Qb4?
      • threat
        • 2.Qc3#
        • 2.Qd6#
      • 1...Sxc6
        • 2.Qd6#
      • 1...Ra3
        • 2.Qd6#
      • 1...Sc5
        • 2.Qc3#
        • 2.Qxc5#
      • 1...Sxb4!
    • 1.Qb5+?
      • 1...Kd4
        • 2.Bb1#
        • 2.Bc2#
        • 2.Bd3#
        • 2.Bf5#
        • 2.Bg6#
        • 2.Bh7#
        • 2.Rd3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Bxb5!
  • Keys
    • 1.Re3!
      • threat
        • 2.f4#
      • 1...Rxb2
        • 2.Qxb2#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Rf5
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,P_PINP(B),XP(A)::QAB(I),XR(a)
    • S(e);N_GUARD::QAR2(I),XS(e)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAB1(I)
      • Refutation
        • S(g);XP(J)
    • Try
      • R(G);CHECK
      • Refutation
        • R(d);CHECK,XR(G)
    • Try
      • Q(I);
      • Threat
        • QAB(I)
      • Vars
        • S(g);OGATE,XP(J)::QAR(I)+B(F),XS(g)
      • Refutation
        • R(a);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::QAB1(I)
      • Refutation
        • S(g);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);XP(J)::QAB1(I)
        • R(a);::QAB1(I)
      • Refutation
        • S(e);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR2(I),XS(e)
      • Refutation
        • B(b);XQ(I)
  • Actual
    • R(D);
    • Threat
      • P(B)
    • Vars
      • R(a);OGATE,P_PINP(B),XP(A)::QAB(I),XR(a)
      • S(e);N_GUARD::QAR2(I),XS(e)
      • R(d);SBLOCK::R(D)+B(F)
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