MESON Chess Problem Database

Problem Display
PID: 251621 (1B1RN2b/r1np4/1p4Q1/1Rq1kP2/6n1/P7/3KN1B1/8 w - - 0 1)

Barron, Philip

Jerusalem Post, 1950

(First published on Fri Aug 11 1950)

1B1RN2b/r1np4/1p4Q1/1Rq1kP2/6n1/P7/3KN1B1/8

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5+
      • 2.Rxd5#
    • 1...d5
      • 2.Qe6#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sc4#
        • 2.Sf7#
      • 1...Qxb5
        • 2.Sf7#
      • 1...Ra4
        • 2.Sf7#
      • 1...Se3
        • 2.Sf7#
      • 1...Sh6
        • 2.Sc4#
      • 1...Qd5+!
    • 1.Bxc7+?
      • 1...d6
        • 2.Bxd6#
        • 2.Qe6#
      • 1...Rxc7!
    • 1.Rxc5+?
      • 1...d5
        • 2.Rcxd5#
        • 2.Rdxd5#
        • 2.Qe6#
      • 1...bxc5!
    • 1.Rxd7?
      • threat
        • 2.Re7#
        • 2.Qe6#
      • 1...Qd5+
        • 2.Rbxd5#
        • 2.Rdxd5#
      • 1...Sf6
        • 2.Re7#
      • 1...Bf6!
    • 1.Qxg4?
      • threat
        • 2.Qe4#
        • 2.Qf4#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...d5
        • 2.Qf4#
      • 1...Ra4!
    • 1.Qg5?
      • threat
        • 2.Qf4#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Ra4!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Re8#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Sf6
        • 2.Qg3#
      • 1...d5
        • 2.Qe6#
      • 1...d6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,OGATE::R1(E),XQ(b)
    • P(g);N_GUARD,N_SPINQ(b)::QAR1(G)
  • Tries
    • Try
      • S(J);N_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_SPINQ(b),XR(E)::S(J)
        • R(e);::S(J)
        • S(a);::S(J)
      • Refutation
        • Q(b);CHECK
    • Try
      • B(H);CHECK,XS(f)
      • Refutation
        • R(e);XB(H)
    • Try
      • R(E);CHECK,XQ(b)
      • Refutation
        • P(d);XR(E)
    • Try
      • R(I);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::R(I)
      • Refutation
        • B(h);
    • Try
      • Q(G);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::R1(E),XQ(b)
        • P(g);N_SPINQ(b)::QAB1(G)
      • Refutation
        • R(e);
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • Q(b);CHECK,OGATE::R1(E),XQ(b)
      • Refutation
        • R(e);
  • Actual
    • S(J);
    • Threat
      • R(I)
    • Vars
      • Q(b);CHECK,OGATE::R1(E),XQ(b)
      • S(a);OGATE,SBLOCK::QAB(G)
      • P(g);N_GUARD,N_SPINQ(b)::QAR1(G)
      • P(g);N_SPINS(f)::QAB1(G),XP(g)
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