MESON Chess Problem Database

Problem Display
PID: 234393 (1R5Q/r1n5/p7/r3R2K/p1pk1p2/3N4/NPP3B1/6n1 w - - 0 1)

Kipping, Cyril Stanley

Skakbladet, 1939

1R5Q/r1n5/p7/r3R2K/p1pk1p2/3N4/NPP3B1/6n1

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5+
      • 2.Qxe5#
    • 1...Sb5
      • 2.Re7#
    • 1...Sd5
      • 2.Re4#
    • 1...cxd3
      • 2.Rb4#
    • 1...c3
      • 2.Rb4#
  • Tries
    • 1.Rf5+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Ke3!
    • 1.Rg5+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Ke3!
    • 1.Rd8+?
      • 1...Sd5
        • 2.Re4#
        • 2.Re7#
      • 1...Rd5!
    • 1.Qh7?
      • threat
        • 2.Qe4#
        • 2.c3#
      • 1...cxd3
        • 2.Qe4#
      • 1...c3
        • 2.Rb4#
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sd5
        • 2.Re4#
        • 2.Qe4#
      • 1...Rxe5+!
    • 1.Qd8+?
      • 1...Sd5
        • 2.Re4#
      • 1...Rd5!
  • Keys
    • 1.Sac1!
      • threat
        • 2.c3#
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...cxd3
        • 2.Rb4#
      • 1...c3
        • 2.Rb4#
      • 1...Se2
        • 2.Sxe2#
      • 1...Sb5
        • 2.Re7#
      • 1...Sd5
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);CHECK,OGATE,P_SPINR(f),XR(F)::QAB1(I),XR(f)
    • S(i);N_PINR(F)::QAB(I)+R(F)
    • S(i);N_PINR(F),SBLOCK::QAB(I)+R(F),DCHECK
    • P(c);OGATEB,XS(E)::R(H)
    • P(c);OGATEB::R(H)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(I),XR(f)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(I),XR(f)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(H);CHECK
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(E)::QAR1(I)
        • S(a);::QAR1(I)
        • S(i);N_PINR(F)::QAR1(I)
      • Refutation
        • R(f);CHECK,XR(F)
    • Try
      • Q(I);CHECK
      • Vars
        • S(i);N_PINR(F),P_SPINS(i)::R1(F)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • S(A);
    • Threat
      • P(C)
    • Vars
      • R(f);CHECK,OGATE,P_SPINR(f),XR(F)::QAB1(I),XR(f)
      • P(c);OGATEB,XS(E)::R(H)
      • P(c);OGATEB::R(H)
      • S(a);N_GUARD::S(A),XS(a)
      • S(i);N_PINR(F)::QAB(I)+R(F)
      • S(i);N_PINR(F),SBLOCK::QAB(I)+R(F),DCHECK
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