MESON Chess Problem Database

Problem Display
PID: 210167 (1r6/1Rbpp3/3kp2n/NK2N1qR/2P2p2/1p3r2/6p1/4Qbn1 w - - 0 1)

Schor, Laszlo

The Observer, 1920

(First published on Sun Sep 5 1920)

1r6/1Rbpp3/3kp2n/NK2N1qR/2P2p2/1p3r2/6p1/4Qbn1

#2

7 + 14

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Qb4#
    • 1...Qf6
      • 2.Qb4#
    • 1...Qg3
      • 2.Qb4#
    • 1...Qg4
      • 2.Qb4#
    • 1...Qxe5+
      • 2.Qxe5#
    • 1...Qg6
      • 2.Qb4#
    • 1...Qg7
      • 2.Qb4#
    • 1...Qg8
      • 2.Qb4#
    • 1...Rxb7+
      • 2.Sxb7#
    • 1...Bb6
      • 2.Rxd7#
    • 1...Sf5
      • 2.Sf7#
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qd4#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Rxb7+
        • 2.Sxb7#
      • 1...Bxc4+
        • 2.Sxc4#
      • 1...Rd3
        • 2.c5#
      • 1...Bb6
        • 2.Rxd7#
      • 1...Se2
        • 2.c5#
      • 1...Sf5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_PINS(E)::QAB(A)
    • Q(g);CHECK,OGATE,XS(E)::QAB1(A),XQ(g)
    • R(n);CHECK,XR(G)::S(C),XR(n)
    • B(k);N_PINR(G)::R1(G),XP(l)
    • S(j);N_PINS(E)::S(E)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • Q(g);CHECK,OGATE,XS(E)::QAB1(A),XQ(g)
      • R(n);CHECK,XR(G)::S(C),XR(n)
      • B(a);CHECK,XP(B)::S(C),XB(a)
      • R(e);N_PINP(B)::P(B)
      • B(k);N_PINR(G)::R1(G),XP(l)
      • S(b);N_PINP(B)::P(B)
      • S(j);N_PINS(E)::S(E)
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Developed and maintained by Brian Stephenson.
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