MESON Chess Problem Database

Problem Display
PID: 21496 (8/2Q2b2/1KP3q1/3k2p1/6P1/1RPprp2/1b5B/1B6 w - - 0 1)

Ellerman, Arnoldo

Good Companions (February), 1919

8/2Q2b2/1KP3q1/3k2p1/6P1/1RPprp2/1b5B/1B6

#2

8 + 8

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qe5#
    • 1...Ke6
      • 2.Qd6#
    • 1...Qxc6+
      • 2.Qxc6#
  • Tries
    • 1.Rb4?
      • threat
        • 2.Ba2#
      • 1...Qxc6+
        • 2.Qxc6#
      • 1...Ke6
        • 2.Qd6#
      • 1...Qe4
        • 2.Qd6#
        • 2.Qd7#
      • 1...Re4!
    • 1.Rb5+?
      • 1...Ke4
        • 2.Re5#
        • 2.Qe5#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kc4!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Rb4#
        • 2.Qb5#
      • 1...Rxe5!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Rb4#
      • 1...Qxc6+
        • 2.Qxc6#
      • 1...Kc4
        • 2.Ra3#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6
        • 2.Qd6#
      • 1...Qe4
        • 2.Rb5#
      • 1...Re4
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(e);P_SPINP(b),S_FLIGHT::QAR1(H)
    • K(e);N_PINP(G),S_FLIGHT::QAR1(H)
    • Q(g);CHECK,OGATE,XP(G)::QAB1(H),XQ(g)
  • Tries
    • Try
      • R(C);
      • Threat
        • B(A)
      • Vars
        • Q(g);CHECK,OGATE,XP(G)::QAB1(H),XQ(g)
        • K(e);N_PINP(G),S_FLIGHT::QAR1(H)
      • Refutation
        • R(c);
    • Try
      • R(C);CHECK
      • Vars
        • K(e);N_PINP(G),S_FLIGHT::QAR1(H)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • R(c);XQ(H)
  • Actual
    • B(A);
    • Threat
      • B(A)+R(C)
    • Vars
      • Q(g);CHECK,OGATE,XP(G)::QAB1(H),XQ(g)
      • K(e);S_FLIGHT::B(A)+R(C)
      • K(e);S_FLIGHT::QAR1(H)
      • K(e);N_PINP(G),S_FLIGHT::QAR1(H)
      • Q(g);N_PINP(G),SBLOCK::B(A)+R(C),DCHECK
      • R(c);SBLOCK::B(A)+R(C),DCHECK
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