MESON Chess Problem Database

Problem Display
PID: 198323 (2K5/1n6/2pk1P2/P2p1P2/3B1p2/3Q4/3N2n1/8 w - - 0 1)

van Dijk, Johannes

Gymnasiasten Schach Blad, 1920

2K5/1n6/2pk1P2/P2p1P2/3B1p2/3Q4/3N2n1/8

#2

7 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qa6#
  • Tries
    • 1.Ba1?
      • threat
        • 2.Se4#
      • 1...d4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Sc4#
      • 1...c5
        • 2.Qa6#
      • 1...Kc5!
    • 1.Bc3?
      • threat
        • 2.Se4#
      • 1...d4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Sc4#
      • 1...c5
        • 2.Qa6#
      • 1...Kc5!
    • 1.Qe2?
      • threat
        • 2.Qe5#
        • 2.Qe6#
        • 2.Qe7#
      • 1...c5
        • 2.Qa6#
        • 2.Qe6#
      • 1...Sc5
        • 2.Be5#
        • 2.Qe5#
        • 2.Qe7#
      • 1...Sd8
        • 2.Qe5#
        • 2.Qe7#
      • 1...Se3!
    • 1.Qe4?
      • threat
        • 2.Qe5#
        • 2.Qe6#
        • 2.Qe7#
      • 1...c5
        • 2.Qe6#
      • 1...Sc5
        • 2.Be5#
        • 2.Qe5#
        • 2.Qe7#
      • 1...Sd8
        • 2.Qe5#
        • 2.Qe7#
      • 1...dxe4!
    • 1.Qa3+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...c5!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Se4#
      • 1...Kc5
        • 2.Ba3#
      • 1...d4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Sc4#
      • 1...c5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAR(B)
  • Tries
    • Try
      • B(C);P_PINP(c)
      • Threat
        • S(A)
      • Vars
        • P(c);OGATEB::QAR2(B),XP(c)
        • S(f);SBLOCK::S(A)
        • P(d);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • K(e);N_SPINP(c),S_FLIGHT
    • Try
      • B(C);P_PINP(c)
      • Threat
        • S(A)
      • Vars
        • P(c);OGATEB::QAR2(B),XP(c)
        • S(f);SBLOCK::S(A)
        • P(d);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • K(e);N_SPINP(c),S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);::QAR1(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(B),XS(f)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • B(C);P_PINP(c)
    • Threat
      • S(A)
    • Vars
      • K(e);N_SPINP(c),S_FLIGHT::B(C)
      • P(c);OGATEB::QAR2(B),XP(c)
      • S(f);SBLOCK::S(A)
      • P(d);OGATEB,SBLOCK::QAR(B)
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