MESON Chess Problem Database

Problem Display
PID: 267657 (B5R1/B5r1/5R2/4P3/3rnN1p/2QN1kPP/8/2K5 w - - 0 1)

Bottacchi, Antonio

Source?, 0000

B5R1/B5r1/5R2/4P3/3rnN1p/2QN1kPP/8/2K5

#2

11 + 5

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3
      • 2.Qxd3#
    • 1...Ra4
      • 2.Se1#
      • 2.Sb2#
      • 2.Sf2#
      • 2.Sb4#
    • 1...Rb4
      • 2.Se1#
      • 2.Sb2#
      • 2.Sf2#
      • 2.Sxb4#
    • 1...Rc4
      • 2.Se1#
    • 1...Rd5
      • 2.Se1#
    • 1...Rd6
      • 2.Se1#
    • 1...Rdd7
      • 2.Se1#
    • 1...Rd8
      • 2.Se1#
  • Tries
    • 1.Sb2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kf2!
    • 1.Sf2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kxf2!
    • 1.Sb4+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kf2!
    • 1.Bxd4?
      • threat
        • 2.Se1#
        • 2.Sb2#
        • 2.Sf2#
        • 2.Sb4#
        • 2.Sc5#
      • 1...Rb7
        • 2.Se1#
      • 1...Rc7
        • 2.Se1#
        • 2.Sc5#
      • 1...Kxg3!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qf2#
      • 1...Ke3
        • 2.Sg2#
        • 2.Sd5#
        • 2.Qe2#
      • 1...Kxg3
        • 2.Qg2#
      • 1...hxg3
        • 2.Sg2#
        • 2.Qe2#
      • 1...Rc4
        • 2.Sh5#
      • 1...Rd5
        • 2.Qg2#
      • 1...Rb7
        • 2.Qe2#
      • 1...Rc7
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(b);OGATE,P_SPINR(b),XS(C)::QAR2(B),XR(b)
    • R(b);P_PINQ(B)::QAR(B)+S(C),DCHECK
    • R(b);N_SPINS(c)::QAR(B)+S(C),DCHECK
    • R(b);::QAR(B)+S(C),DCHECK
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR2(B),XR(b)
      • Refutation
        • K(a);N_SPINS(c),P-FLIGHT,P_SPINR(b)
    • Try
      • S(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR2(B),XR(b)
      • Refutation
        • K(a);N_SPINS(c),P-FLIGHT,P_SPINR(b),XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR2(B),XR(b)
      • Refutation
        • K(a);N_SPINS(c),P-FLIGHT,P_SPINR(b)
    • Try
      • B(I);XR(b)
      • Threat
        • DUALS(5)
      • Vars
        • R(e);N_SPINS(c)::QAR(B)+S(C),DCHECK
      • Refutation
        • K(a);N_SPINS(c),P-FLIGHT,P_SPINR(e),XP(D)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(a);N_GUARD,N_SPINS(c),P-FLIGHT,P_SPINR(e),XP(D)::QAR1(B)
      • R(b);P_PINQ(B)::R(H)+S(F)
      • R(b);N_SPINS(c)::QAB1(B)
      • R(e);N_SPINS(c)::QAB1(B)
      • R(e);P_PINQ(B)::R(H)+S(F)
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