MESON Chess Problem Database

Problem Display
PID: 21602 (3R4/3Q4/3Np3/r3p1B1/8/1bP5/1Rp2K2/n2k4 w - - 0 1)

Hannemann, Knud Harald

3rd Prize, Brisbane Courier, 1920

3R4/3Q4/3Np3/r3p1B1/8/1bP5/1Rp2K2/n2k4

#2

7 + 7

3360 Simple Two-move Themes 1924
5501 Chess Cameos 1936
14868 Pirnie Collection 2012
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sc4#
    • 1...Ra3
      • 2.Sc4#
    • 1...Ra4
      • 2.Sc4#
    • 1...Ra8
      • 2.Sc4#
    • 1...Ba4
      • 2.Sb5#
    • 1...c1S
      • 2.Rd2#
    • 1...c1R
      • 2.Rd2#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Sc4#
        • 2.Qf1#
        • 2.Qe2#
        • 2.Qd3#
      • 1...c1Q
        • 2.Qf1#
        • 2.Qe2#
      • 1...c1S
        • 2.Rd2#
        • 2.Qf1#
      • 1...c1B
        • 2.Qf1#
        • 2.Qe2#
      • 1...Ra6
        • 2.Qf1#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Ra7
        • 2.Qf1#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Ra8
        • 2.Qf1#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Bc4
        • 2.Sxc4#
      • 1...Bd5
        • 2.Qf1#
        • 2.Qe2#
        • 2.Qd3#
      • 1...e4
        • 2.Sc4#
        • 2.Qf1#
        • 2.Qe2#
      • 1...Rxb5!
    • 1.Qh7?
      • threat
        • 2.Qd3#
        • 2.Qh1#
        • 2.Qh5#
      • 1...c1Q
        • 2.Qh1#
        • 2.Qh5#
      • 1...c1S
        • 2.Rd2#
        • 2.Qh1#
      • 1...c1B
        • 2.Qh1#
        • 2.Qh5#
      • 1...Ra4
        • 2.Sc4#
        • 2.Qd3#
        • 2.Qh1#
      • 1...Rd5
        • 2.Qh1#
        • 2.Qh5#
      • 1...Bd5
        • 2.Qd3#
      • 1...e4
        • 2.Qh1#
        • 2.Qh5#
      • 1...Bc4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qg4#
      • 1...Rxa4
        • 2.Sc4#
      • 1...Bxa4
        • 2.Sb5#
      • 1...c1S
        • 2.Rd2#
      • 1...Bc4
        • 2.Rb1#
      • 1...Bd5
        • 2.Rb1#
      • 1...e4
        • 2.Qd4#

This anticipates 225596(1950)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD::QAR(F)+S(E)
    • B(d);N_GUARD::QAR(F)+S(E)
    • P(c);OGATE,SBLOCK::R1(A)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(4)
      • Vars
        • B(d);::R(G)+S(E),XB(d)
      • Refutation
        • R(e);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • B(d);::QAR2(F)
      • Refutation
        • B(d);
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • R(e);N_GUARD,XQ(F)::R(G)+S(E)
      • B(d);N_GUARD,XQ(F)::R(G)+S(E)
      • P(c);OGATE,P_SPINB(d),SBLOCK::R1(A)
      • B(d);P_SPINP(c)::R(A)
      • P(f);N_GUARD::QAR(F)
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