MESON Chess Problem Database

Problem Display
PID: 261846 (Q7/1R6/2R1p3/8/8/3PNp2/N2knK2/n4B2 w - - 0 1)

Barnes, Barry Peter

The Problemist Supplement, 2022

Q7/1R6/2R1p3/8/8/3PNp2/N2knK2/n4B2

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qa5#
    • 1...Sg1
      • 2.Qa5#
    • 1...Sg3
      • 2.Qa5#
    • 1...Sd4
      • 2.Qa5#
    • 1...Sf4
      • 2.Qa5#
  • Tries
    • 1.Bxe2?
      • threat
        • 2.Sf1#
        • 2.Qa5#
      • 1...Sc2
        • 2.Sf1#
        • 2.Sc4#
        • 2.Rxc2#
      • 1...Sb3
        • 2.Sf1#
        • 2.Rc2#
      • 1...fxe2!
    • 1.Rc2+?
      • 1...Kxd3
        • 2.Rd7#
      • 1...Sxc2!
    • 1.Rb1?
      • threat
        • 2.Rd1#
      • 1...Kxd3
        • 2.Rd6#
      • 1...Sc1
        • 2.Qa5#
      • 1...Sc3!
    • 1.Rb2+?
      • 1...Kxd3
        • 2.Rd6#
      • 1...Sc2!
    • 1.Qa4?
      • threat
        • 2.Qd1#
      • 1...Kxd3
        • 2.Rd6#
        • 2.Rd7#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sc3
        • 2.Sc4#
      • 1...Sb3!
    • 1.Qa5+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Kxd3!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Rd1#
      • 1...Kxd3
        • 2.Rd7#
      • 1...Sxc1
        • 2.Qa5#
      • 1...Sc3
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::QAB(H)
  • Tries
    • Try
      • B(A);XS(c)
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);XB(A)
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(c),S_CUTS(a),XP(D)::R(G)
      • Refutation
        • S(a);XR(F)
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINS(c),XP(D)::R(F)
        • S(c);N_GUARD::QAB(H)
      • Refutation
        • S(c);
    • Try
      • R(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(c),S_CUTS(a),XP(D)::R(F)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • S(a);N_GUARD::QAR1(H),XS(a)
        • S(c);::S(E)
      • Refutation
        • S(a);
    • Try
      • Q(H);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(H),XS(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINS(c),XP(D)
  • Actual
    • R(F);
    • Threat
      • R1(F)
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINS(c),XP(D)::R(G)
      • S(c);N_GUARD,XR(F)::QAB(H)
      • S(c);::S(E)
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