MESON Chess Problem Database

Problem Display
PID: 183365 (qR4Qn/pr5B/8/p5BK/N6p/p7/2N2p2/1kb2R1r w - - 0 1)

Taylor, A

Problem Observer, 2016

qR4Qn/pr5B/8/p5BK/N6p/p7/2N2p2/1kb2R1r

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Rxc1#
    • 1...Rh3
      • 2.Rxc1#
    • 1...Rb2
      • 2.Sc3#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Rb5
      • 2.Rxb5#
  • Tries
    • 1.Sb4+?
      • 1...Ka1
        • 2.Bf6#
        • 2.Qa2#
      • 1...Sg6
        • 2.Qa2#
      • 1...Rxh7+!
    • 1.Qxh8?
      • threat
        • 2.Qa1#
      • 1...Rb2
        • 2.Sc3#
      • 1...Ka2!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Sxa3#
      • 1...Rb5+
        • 2.Rxb5#
      • 1...Rb3
        • 2.Qxb3#
      • 1...Sf7
        • 2.Sb4#
      • 1...Rb2
        • 2.Sc3#
      • 1...a2
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::R1(A),XB(b)
    • R(i);::S(C)
    • R(i);N_GUARD::QAR2(H),XR(i)
    • R(i);OGATE,P_PINB(D)::R(G),XR(i)
  • Tries
    • Try
      • S(B);CHECK,N_PINR(i)
      • Vars
        • S(k);P_SPINS(k)::QAB1(H)
      • Refutation
        • R(i);CHECK,XB(F)
    • Try
      • Q(H);XS(k)
      • Threat
        • QAR1(H)
      • Vars
        • R(i);::S(C)
      • Refutation
        • K(a);N_SPINB(b),N_SPINR(i),S_FLIGHT
  • Actual
    • B(D);
    • Threat
      • B(F)+S(B),DCHECK,XP(e)
    • Vars
      • R(i);CHECK,OGATE::R(G),XR(i)
      • R(i);N_GUARD::QAR2(H),XR(i)
      • S(k);N_GUARD::B(F)+S(B)
      • R(i);::S(C)
      • P(e);::B(F)+S(B),DCHECK
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