MESON Chess Problem Database

Problem Display
PID: 193389 (7b/4pn1B/8/n2pR2K/r4kp1/P2p4/1Q2p2P/3bN3 w - - 0 1)

Goethart, Gerhardus Hendrik

Algemeen Handelsblad, 1914

7b/4pn1B/8/n2pR2K/r4kp1/P2p4/1Q2p2P/3bN3

#2

7 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Bxe5
      • 2.Qd2#
    • 1...Sc4
      • 2.Qd4#
    • 1...Sxe5
      • 2.Qd2#
    • 1...d4
      • 2.Re4#
  • Tries
    • 1.Rf5+?
      • 1...Ke4
        • 2.Rf3#
      • 1...Ke3!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qe3#
      • 1...Kxe5
        • 2.Sxd3#
      • 1...Bxe5
        • 2.Qf2#
      • 1...Sxe5
        • 2.Qh6#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Re4
        • 2.Rf5#
      • 1...Sc4
        • 2.Qd4#
      • 1...d4
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD,XP(D)::QAR2(B)
    • R(d);N_GUARD::QAR2(B),XR(d)
    • B(k);SBLOCK,XR(E)::QAB(B)
    • S(g);S_CUTR(d)::QAR2(B)
    • S(j);SBLOCK,XR(E)::QAB(B)
    • P(h);N_GUARD,S_CUTR(d)::R1(E)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(e);OGATE,P-FLIGHT::B(G)+R(E)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(e);S_FLIGHT,XR(E)::S(A),XP(c)
      • B(k);SBLOCK,XR(E)::QAR2(B)
      • S(j);N_GUARD,SBLOCK,XR(E)::QAB(B)
      • R(d);N_GUARD::QAR2(B),XR(d)
      • R(d);SBLOCK::R1(E)
      • S(g);S_CUTR(d)::QAR2(B)
      • P(h);N_GUARD,S_CUTR(d)::R1(E)
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