MESON Chess Problem Database

Problem Display
PID: 63582 (8/1B1pQ3/1q1Pp1K1/2pN3p/1RP1k3/Rn2pN1P/4p1P1/6b1 w - - 0 1)

Barnes, Barry Peter

HM., Schach-Echo, 1975

8/1B1pQ3/1q1Pp1K1/2pN3p/1RP1k3/Rn2pN1P/4p1P1/6b1

#2

11 + 10

3771 FIDE Album (1974-1976) 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qh4#
    • 1...Sc1
      • 2.Qh4#
    • 1...Sd2
      • 2.Qh4#
    • 1...Sd4
      • 2.Qh4#
    • 1...Sa5
      • 2.Qh4#
  • Tries
    • 1.Kxh5?
      • threat
        • 2.Qh7#
      • 1...Kd3
        • 2.Qh7#
      • 1...Kf5
        • 2.Qh7#
      • 1...Sd4!
    • 1.Kf6?
      • threat
        • 2.Qh7#
      • 1...Kd3
        • 2.Qh7#
      • 1...Sd4
        • 2.Sg5#
      • 1...Qd8!
    • 1.Kh6?
      • threat
        • 2.Qh7#
      • 1...Kd3
        • 2.Qh7#
      • 1...Kf5
        • 2.Qh7#
      • 1...Sd4!
    • 1.Sc3+?
      • 1...Kf4
        • 2.Sxe2#
        • 2.Qh4#
        • 2.Qg5#
      • 1...Kd3!
    • 1.Sxb6+?
      • 1...Kf4
        • 2.Qh4#
        • 2.Qg5#
      • 1...Kd3!
    • 1.Sf6+?
      • 1...Kf4
        • 2.Sxh5#
      • 1...Kd3!
    • 1.Qxe6+?
      • 1...Kd3
        • 2.Qf5#
      • 1...dxe6!
    • 1.Qh7?
      • threat
        • 2.Kg5#
        • 2.Kxh5#
        • 2.Kf6#
        • 2.Kh6#
        • 2.Kf7#
        • 2.Kg7#
      • 1...Kd3
        • 2.Kg5#
        • 2.Kxh5#
        • 2.Kf6#
        • 2.Kh6#
        • 2.Kf7#
        • 2.Kg7#
      • 1...exd5
        • 2.Kg5#
      • 1...Qd8
        • 2.Kxh5#
        • 2.Kh6#
        • 2.Kf7#
        • 2.Kg7#
      • 1...h4
        • 2.Kg5#
        • 2.Kh5#
        • 2.Kf6#
        • 2.Kh6#
        • 2.Kf7#
        • 2.Kg7#
      • 1...Sd4!
  • Keys
    • 1.Kg5!
      • threat
        • 2.Qh7#
      • 1...Kd3
        • 2.Qh7#
      • 1...Qd8
        • 2.Sf4#
      • 1...Sd4
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);::QAR(K)
  • Tries
    • Try
      • K(I);S_FLIGHT,XP(g)
      • Threat
        • QAB(K)
      • Vars
        • K(e);N_SPINP(i),P_SPINS(c),S_FLIGHT::QAB(K)
        • K(e);N_SPINP(i),S_FLIGHT::QAB(K)
      • Refutation
        • S(c);
    • Try
      • K(I);P-FLIGHT
      • Threat
        • QAB(K)
      • Vars
        • K(e);N_SPINP(i),P_SPINS(c),S_FLIGHT::QAB(K)
        • S(c);SBLOCK::S(C)
      • Refutation
        • Q(h);P_PINQ(K)
    • Try
      • K(I);P-FLIGHT
      • Threat
        • QAB(K)
      • Vars
        • K(e);N_SPINP(i),P_SPINS(c),S_FLIGHT::QAB(K)
        • K(e);N_SPINP(i),S_FLIGHT::QAB(K)
      • Refutation
        • S(c);
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);N_SPINP(i),S_FLIGHT
    • Try
      • S(G);CHECK,XQ(h)
      • Refutation
        • K(e);N_SPINP(i),P_SPINS(c),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_SPINP(i),P-FLIGHT::S(G),XP(g)
      • Refutation
        • K(e);N_SPINP(i),P_SPINS(c),S_FLIGHT
    • Try
      • Q(K);CHECK,XP(i)
      • Vars
        • K(e);P_SPINS(c),S_FLIGHT::QAB(K)
      • Refutation
        • P(j);XQ(K)
    • Try
      • Q(K);N_PINP(i)
      • Threat
        • DUALS(6)
      • Vars
        • P(i);P_PINP(H),P_SPINP(i),XS(G)::QAB(K)+K(I)
      • Refutation
        • S(c);
  • Actual
    • K(I);P-FLIGHT
    • Threat
      • QAB(K)
    • Vars
      • K(e);N_SPINP(i),P_SPINS(c),S_FLIGHT::QAB(K)
      • Q(h);N_GUARD,P_PINQ(K)::B(J)+S(G)
      • S(c);::B(J)+S(G),DCHECK
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