MESON Chess Problem Database

Problem Display
PID: 202440 (8/8/p2p4/K1pp4/2kN4/1p2Q3/bn1R4/8 w - - 0 1)

van Dijk, Johannes

Algemeen Dagblad, 1923

8/8/p2p4/K1pp4/2kN4/1p2Q3/bn1R4/8

#2

4 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxb3#
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...cxd4
      • 2.Qxd4#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Sa3#
      • 1...bxc2
        • 2.Rxc2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...d4!
    • 1.Se2?
      • threat
        • 2.Qc3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...d4!
    • 1.Sf5?
      • threat
        • 2.Sxd6#
      • 1...Sd3
        • 2.Qxd3#
      • 1...d4!
    • 1.Rd1?
      • threat
        • 2.Rc1#
        • 2.Qc1#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Bb1
        • 2.Qxb3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sxd1!
    • 1.Qe2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kc3!
    • 1.Qf3?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Bb1
        • 2.Qxb3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...cxd4!
    • 1.Qg3?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Bb1
        • 2.Qxb3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...cxd4!
  • Keys
    • 1.Qh3!
      • 1...cxd4
        • 2.Qc8#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Bb1
        • 2.Qxb3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(B),XP(c)
    • S(b);N_GUARD::QAB1(B)
    • S(b);N_GUARD::QAB1(B),XS(b)
    • P(e);OGATE,XS(C)::QAR1(B),XP(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • P(c);OGATE,XS(C)::R(A),XP(c)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(f);
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • S(b);N_GUARD::QAB1(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(f);
    • Try
      • S(C);
      • Threat
        • S(C),XP(h)
      • Vars
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(f);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAB1(B),XS(b)
        • B(a);N_GUARD::QAB1(B),XP(c)
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • S(b);XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(B),XS(b)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(b);N_GUARD::QAB1(B),XS(b)
        • B(a);N_GUARD::QAB1(B),XP(c)
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • P(e);XS(C)
    • Try
      • Q(B);
      • Vars
        • S(b);N_GUARD::QAB1(B),XS(b)
        • B(a);N_GUARD::QAB1(B),XP(c)
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • P(e);XS(C)
  • Actual
    • Q(B);
    • Vars
      • P(e);OGATEB,XS(C)::QAR(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • B(a);N_GUARD::QAB1(B),XP(c)
      • S(b);N_GUARD::QAB1(B)
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