MESON Chess Problem Database

Problem Display
PID: 162339 (8/8/1Pp3N1/1p2pP2/1Qpk2nR/NP4K1/8/4R3 w - - 0 1)

Alekseev, Yuri Mikhailovich

Hlas l'udu, 1983

8/8/1Pp3N1/1p2pP2/1Qpk2nR/NP4K1/8/4R3

#2

9 + 6

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qd2#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Rd1#
      • 1...Kd3
        • 2.Rd1#
      • 1...Kd5
        • 2.Rd1#
      • 1...e4+!
    • 1.Sb1?
      • threat
        • 2.Qd6#
      • 1...Kd3
        • 2.Qd2#
        • 2.Qc3#
      • 1...c5
        • 2.Qd2#
      • 1...Kd5!
    • 1.Sc2+?
      • 1...Kd5
        • 2.Se7#
      • 1...Kd3!
    • 1.Sxb5+?
      • 1...Kd3
        • 2.Qc3#
      • 1...Kd5
        • 2.Se7#
        • 2.Qd6#
        • 2.Qxc4#
        • 2.bxc4#
      • 1...cxb5!
    • 1.Sxe5?
      • 1...c5
        • 2.Qd2#
      • 1...Kd5!
    • 1.Rd1+?
      • 1...Ke3
        • 2.Qe1#
      • 1...Ke4!
    • 1.Rxg4+?
      • 1...Kd3
        • 2.Sxe5#
      • 1...Kd5
        • 2.Se7#
        • 2.Rd1#
        • 2.Rxe5#
      • 1...e4!
  • Keys
    • 1.Sxc4!
      • 1...Kd3
        • 2.Qd2#
      • 1...Kd5
        • 2.Qd6#
      • 1...bxc4
        • 2.Qxc4#
      • 1...e4
        • 2.Rd1#
      • 1...c5
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(f);SBLOCK::QAR2(E)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • R(A)
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT::R(A)
      • Refutation
        • P(e);CHECK,N_SPINS(c)
    • Try
      • S(B);
      • Threat
        • QAR2(E)
      • Vars
        • P(f);SBLOCK::QAR2(E)
      • Refutation
        • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT::S(I)
      • Refutation
        • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT
    • Try
      • S(B);CHECK,XP(d)
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT::QAR1(E)
      • Refutation
        • P(f);XS(B)
    • Try
      • S(I);XP(e)
      • Vars
        • P(f);SBLOCK::QAR2(E)
      • Refutation
        • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT::QAR2(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK,XS(c)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::S(I),XP(e)
      • Refutation
        • P(e);
  • Actual
    • S(B);XP(a)
    • Vars
      • K(b);N_SPINS(c),P-FLIGHT::QAR1(E)
      • P(d);OGATE,P_SPINP(d),XS(B)::QAR1(E),XP(d)
      • P(e);N_SPINS(c),SBLOCK::R(A)
      • P(f);SBLOCK::QAR2(E)
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