MESON Chess Problem Database

Problem Display
PID: 68364 (5Q2/8/8/1N2KR2/8/8/1pPpk3/1Rb1BN2 w - - 0 1)

Rybakov, Vassily

Comm., Shakhmaty, 1929

5Q2/8/8/1N2KR2/8/8/1pPpk3/1Rb1BN2

#2

8 + 4

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...dxe1S
      • 2.Sc3#
    • 1...dxe1R
      • 2.Sc3#
  • Tries
    • 1.Sg3+?
      • 1...Kxe1
        • 2.Rf1#
      • 1...Ke3
        • 2.Bf2#
        • 2.Rf3#
        • 2.Qa3#
        • 2.Qc5#
        • 2.Qh6#
      • 1...Kd1!
    • 1.Bxd2?
      • threat
        • 2.Sc3#
      • 1...Bxd2
        • 2.Sd4#
        • 2.Rf2#
      • 1...Kd1!
    • 1.Bg3?
      • threat
        • 2.Sc3#
      • 1...d1S
        • 2.Sd4#
      • 1...Kd1!
    • 1.Bh4?
      • threat
        • 2.Sc3#
      • 1...d1S
        • 2.Sd4#
      • 1...Kd1!
  • Keys
    • 1.Qb4!
      • 1...Kd1
        • 2.Qxd2#
      • 1...Kxe1
        • 2.Qxd2#
      • 1...dxe1Q
        • 2.Qg4#
      • 1...dxe1S
        • 2.Sc3#
      • 1...dxe1B
        • 2.Qg4#
      • 1...dxe1R
        • 2.Sc3#
        • 2.Qg4#
      • 1...d1Q
        • 2.Rf2#
      • 1...d1S
        • 2.Sd4#
      • 1...d1B
        • 2.Sd4#
        • 2.Rf2#
      • 1...d1R
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK,XB(B)::S(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINB(a),XB(B)::R1(G)
      • Refutation
        • K(d);P_SPINB(a),S_FLIGHT
    • Try
      • B(B);XP(c)
      • Threat
        • S(E)
      • Refutation
        • K(d);P_SPINB(a),S_FLIGHT
    • Try
      • B(B);
      • Threat
        • S(E)
      • Vars
        • P(c);SBLOCK::S(E)
      • Refutation
        • K(d);P_SPINB(a),S_FLIGHT
    • Try
      • B(B);
      • Threat
        • S(E)
      • Vars
        • P(c);SBLOCK::S(E)
      • Refutation
        • K(d);P_SPINB(a),S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(d);P_SPINB(a),S_FLIGHT::QAR1(H),XP(c)
      • K(d);P-FLIGHT,P_SPINB(a),P_SPINP(c),XB(B)::QAB1(H),XP(c)
      • P(c);SBLOCK,XB(B)::QAB(H)
      • P(c);SBLOCK,XB(B)::S(E)
      • P(c);SBLOCK::R1(G)
      • P(c);SBLOCK::S(E)
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