MESON Chess Problem Database

Problem Display
PID: 249936 (5R2/4p1p1/1Q1p4/2rP4/2p2PN1/R1B2k2/1p3N1P/1K3B2 w - - 0 1)

Jespersen, Karl Lorenz Jesper

Deutsche Schachzeitung, 1891

5R2/4p1p1/1Q1p4/2rP4/2p2PN1/R1B2k2/1p3N1P/1K3B2

#2

11 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qe3#
    • 1...Rb5
      • 2.Qe3#
    • 1...Rxd5
      • 2.Qe3#
    • 1...Rc6
      • 2.Qe3#
    • 1...Rc7
      • 2.Qe3#
    • 1...Rc8
      • 2.Qe3#
    • 1...e5
      • 2.fxe5#
    • 1...g5
      • 2.fxg5#
  • Tries
    • 1.Bg2+?
      • 1...Ke2
        • 2.Qxb2#
      • 1...Kxg2!
    • 1.Bf6+?
      • 1...Kxf4
        • 2.Bh4#
        • 2.Bxe7#
      • 1...c3!
  • Keys
    • 1.f5!
      • 1...Kf4
        • 2.Bd2#
      • 1...Rxd5
        • 2.Qe3#
      • 1...e6
        • 2.fxe6#
      • 1...Ra5
        • 2.Qe3#
      • 1...Rb5
        • 2.Qe3#
      • 1...Rc6
        • 2.Qe3#
      • 1...Rc7
        • 2.Qe3#
      • 1...Rc8
        • 2.Qe3#
      • 1...e5
        • 2.fxe5 ep#
      • 1...g5
        • 2.fxg5 ep#
      • 1...g6
        • 2.fxg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATE::QAR1(J)
    • R(d);OGATE,XP(I)::QAR1(J)
    • P(f);OGATE::R(K)+P(G),XP(f)
    • P(g);OGATE::R(K)+P(G),XP(g)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR(J),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XB(B)
    • Try
      • B(F);CHECK
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • P(G);
    • Vars
      • K(b);P-FLIGHT,S_CUTP(c)::B(F)
      • R(d);OGATE,XP(I)::QAR1(J)
      • P(f);OGATE::R(K)+P(G),XP(f)
      • R(d);OGATE::QAR1(J)
      • P(f);OGATE::R(K)+P(G),XP(f),EP
      • P(g);OGATE::R(K)+P(G),XP(g),EP
      • P(g);OGATE::R(K)+P(G),XP(g)
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