MESON Chess Problem Database

Problem Display
PID: 175883 (8/1K2Q3/1B6/3k3b/7r/1P6/N1n1n3/7R w - - 0 1)

Shire, David J

The Problemist Supplement, 2018

8/1K2Q3/1B6/3k3b/7r/1P6/N1n1n3/7R

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Rxh5#
    • 1...Rb4
      • 2.Rxh5#
    • 1...Rc4
      • 2.Rxh5#
    • 1...Rd4
      • 2.Rxh5#
    • 1...Scd4
      • 2.Sb4#
    • 1...Sc1
      • 2.Sc3#
    • 1...Sg1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sg3
      • 2.Sc3#
    • 1...Sed4
      • 2.Sc3#
    • 1...Sf4
      • 2.Sc3#
  • Tries
    • 1.Sb4+?
      • 1...Rxb4
        • 2.Rxh5#
      • 1...Sxb4!
    • 1.Bc7?
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Rd1#
      • 1...Re4
        • 2.Qd6#
      • 1...Rb4+!
    • 1.Rd1+?
      • 1...Scd4
        • 2.Sb4#
      • 1...Sed4
        • 2.Sc3#
      • 1...Rd4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Rd1#
      • 1...Rxd4
        • 2.Rxh5#
      • 1...Scxd4
        • 2.Sb4#
      • 1...Sexd4
        • 2.Sc3#
      • 1...Re4
        • 2.Qd7#

This is a version of 20961

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(c);OGATE::R(A),XB(e)
    • R(c);OGATE,P_PINB(D)::R(A),XB(e)
    • S(a);N_GUARD,S_CUTR(c)::S(B)
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(c);OGATE,P_PINB(D),XS(B)::R(A),XB(e)
      • Refutation
        • S(a);XS(B)
    • Try
      • B(D);
      • Threat
        • QAR1(F)
      • Vars
        • K(d);P-FLIGHT::R(A)
        • R(c);SBLOCK::QAR1(F)
      • Refutation
        • R(c);CHECK
    • Try
      • R(A);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(B)
        • S(b);P_SPINS(b)::S(B)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • B(D);
    • Threat
      • QAR1(F)
    • Vars
      • K(d);OGATEB,P-FLIGHT,XB(D)::R(A)
      • R(c);OGATE,SBLOCK,XB(D)::R(A),XB(e)
      • S(a);N_GUARD,SBLOCK,XB(D)::S(B)
      • S(b);N_GUARD,SBLOCK,XB(D)::S(B)
      • R(c);SBLOCK::QAR2(F)
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