MESON Chess Problem Database

Problem Display
PID: 247146 (8/8/4p1K1/8/1r3kN1/q6P/2p4P/3RN2Q w - - 0 1)

Gajevskis, A

Sachmatija, 2021

8/8/4p1K1/8/1r3kN1/q6P/2p4P/3RN2Q

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sd3#
      • 2.Qf3#
    • 1...Qb2
      • 2.Sd3#
      • 2.Qf3#
    • 1...Qa1
      • 2.Sd3#
      • 2.Qf3#
    • 1...Qa2
      • 2.Sd3#
      • 2.Qf3#
    • 1...Qd3+
      • 2.Sxd3#
    • 1...Qf3
      • 2.Qxf3#
    • 1...Qa4
      • 2.Sd3#
      • 2.Qf3#
    • 1...Qa5
      • 2.Sd3#
      • 2.Qf3#
    • 1...Qa6
      • 2.Qf3#
    • 1...Qa7
      • 2.Sd3#
      • 2.Qf3#
    • 1...Qa8
      • 2.Sd3#
    • 1...Rb1
      • 2.Rd4#
    • 1...Rb2
      • 2.Rd4#
    • 1...Rb3
      • 2.Rd4#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Rb5
      • 2.Rd4#
    • 1...Rb6
      • 2.Rd4#
    • 1...Rb7
      • 2.Rd4#
    • 1...Rb8
      • 2.Rd4#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Qf3#
      • 1...Qxd3+
        • 2.Sxd3#
      • 1...Qa8!
    • 1.Qf1+?
      • 1...Qf3
        • 2.Qxf3#
      • 1...Ke4!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Sg2#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qxh3
        • 2.Qxb4#
      • 1...Rxb7
        • 2.Rd4#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qg3
        • 2.Qxb4#
      • 1...Re4
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(b);CHECK,N_GUARD::S(B),XQ(b)
    • Q(b);N_GUARD::QAR1(C),XQ(b)
    • Q(b);N_GUARD::QAR1(C)
    • Q(b);N_GUARD::S(B)
    • R(c);N_GUARD::R(A)
    • R(c);N_GUARD::R(A),XR(c)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAR1(C)
      • Vars
        • Q(b);CHECK,XR(A)::S(B),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • Q(C);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(C),XQ(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • S(B)
    • Vars
      • Q(b);CHECK,N_GUARD::S(B),XQ(b)
      • Q(b);N_GUARD,XP(E)::QAR(C),XR(c)
      • R(c);N_GUARD,XQ(C)::R(A)
      • Q(b);N_GUARD::QAR1(C),XQ(b)
      • Q(b);N_GUARD,P_PINS(F)::QAR(C),XR(c)
      • R(c);SBLOCK::QAR(C)
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