MESON Chess Problem Database

Problem Display
PID: 267224 (2Q5/b1N5/4r3/3p4/1Pkn2R1/3p4/1KN5/1n5b w - - 0 1)

Stevenson, Edward

Sunday Referee, 1938

(First published on Sun May 15 1938)

2Q5/b1N5/4r3/3p4/1Pkn2R1/3p4/1KN5/1n5b

#2

6 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qa6#
    • 1...Re2
      • 2.Qa6#
    • 1...Re3
      • 2.Qa6#
    • 1...Re5
      • 2.Qa6#
    • 1...Ra6
      • 2.Qxa6#
    • 1...Rb6
      • 2.Rxd4#
    • 1...Re7
      • 2.Qa6#
    • 1...Re8
      • 2.Qa6#
    • 1...Bb6
      • 2.Qa6#
    • 1...Bb8
      • 2.Rxd4#
  • Tries
    • 1.Sb5+?
      • 1...Rc6
        • 2.Sd6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kxb5!
    • 1.Sxe6+?
      • 1...Bc5
        • 2.Qa6#
        • 2.Qxc5#
      • 1...Kb5!
    • 1.Se8+?
      • 1...Rc6
        • 2.Sd6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kb5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb5#
      • 1...Re4
        • 2.Qxd5#
      • 1...Rb6
        • 2.Rxd4#
      • 1...Be4
        • 2.Se3#
      • 1...Bb6
        • 2.Qa6#
      • 1...Sa3
        • 2.Sxa3#
      • 1...Sc3
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(g);N_GUARD::QAB(F)
    • R(g);N_GUARD,P_PINS(B)::QAB(F)
    • R(g);N_GUARD::QAB(F),XR(g)
    • R(g);P_PINP(C),S_CUTB(h)::R1(D),XS(e)
    • B(h);S_CUTR(g)::QAB(F)
    • B(h);N_GUARD::R1(D),XS(e)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(g);P_SPINR(g)::S(E)
        • B(h);N_GUARD,P_SPINB(h)::QAR1(F),XB(h)
      • Refutation
        • K(d);N_SPINS(e),S_FLIGHT,XS(E)
    • Try
      • S(E);CHECK,XR(g)
      • Refutation
        • K(d);N_SPINS(e),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • R(g);P_SPINR(g)::S(E)
        • B(h);N_GUARD,P_SPINB(h)::QAR1(F),XB(h)
      • Refutation
        • K(d);N_SPINS(e),S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • R(g);N_SPINS(e),S_CUTB(b)::QAB1(F),XP(f)
      • R(g);P_PINP(C),S_CUTB(h)::R1(D),XS(e)
      • B(b);N_SPINS(e),S_CUTR(g)::S(B)
      • B(h);S_CUTR(g)::QAB(F)
      • S(a);N_GUARD::S(B),XS(a)
      • S(a);N_GUARD::S(B)
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