MESON Chess Problem Database

Problem Display
PID: 263285 (2Q4K/4R3/Nb5B/pp1pNP2/bp1kP2P/1p5R/4p1p1/3Br1q1 w - - 0 1)

Erokhin, Vladimir Alekseevich

5th Comm., Szachy, 1988

2Q4K/4R3/Nb5B/pp1pNP2/bp1kP2P/1p5R/4p1p1/3Br1q1

#2

11 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Sc6#
    • 1...dxe4
      • 2.Qd7#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Sc6#
      • 1...dxe4
        • 2.Sc6#
        • 2.Rd7#
        • 2.Qd7#
        • 2.Qd6#
      • 1...Qe3!
    • 1.Qd7?
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Sc6#
      • 1...Qe3!
    • 1.Qc2?
      • threat
        • 2.Sf3#
        • 2.Sc6#
        • 2.Qd3#
      • 1...Rxd1
        • 2.Sf3#
        • 2.Sc6#
      • 1...exd1Q
        • 2.Sc6#
      • 1...exd1B
        • 2.Sc6#
        • 2.Qd3#
      • 1...exd1R
        • 2.Sf3#
        • 2.Sc6#
      • 1...dxe4
        • 2.Qd2#
      • 1...Qe3
        • 2.Sc6#
        • 2.Bxe3#
      • 1...Qf2
        • 2.Sc6#
        • 2.Qd3#
      • 1...Qf1
        • 2.Sc6#
        • 2.Be3#
        • 2.Qd3#
      • 1...Rf1
        • 2.Sc6#
        • 2.Qd3#
      • 1...bxc2!
    • 1.Qc3+?
      • 1...Kxe4
        • 2.Qd3#
      • 1...bxc3!
    • 1.Qc4+?
      • 1...dxc4
        • 2.Sc6#
      • 1...bxc4!
    • 1.Qg8?
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qg4#
      • 1...dxe4
        • 2.Sc6#
      • 1...Qe3!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Sc6#
      • 1...Kxe4
        • 2.Qf4#
      • 1...dxe4
        • 2.Qd2#
      • 1...Qe3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(h);N_GUARD,P-FLIGHT,XP(C)::R(I)+S(E)
    • P(k);OGATEB,SBLOCK,XP(C)::QAR(J)
  • Tries
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XP(k)
      • Vars
        • K(h);N_GUARD,P-FLIGHT,XP(C)::QAR(J)+S(E)
      • Refutation
        • Q(b);
    • Try
      • Q(J);P_PINP(k)
      • Threat
        • QAR1(J),XP(k)
      • Vars
        • K(h);N_GUARD,N_SPINP(k),P-FLIGHT,XP(C)::R(I)+S(E)
      • Refutation
        • Q(b);
    • Try
      • Q(J);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);XB(A)::S(E)
        • P(k);SBLOCK,XP(C)::QAR2(J)
      • Refutation
        • P(e);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • K(h);P-FLIGHT,XP(C)::QAB1(J)
      • Refutation
        • P(g);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • P(k);SBLOCK,XQ(J)::S(E)
      • Refutation
        • P(j);XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XP(k)
      • Vars
        • K(h);OGATEB,P-FLIGHT,XP(C)::QAR2(J)
        • P(k);XP(C)::S(E)
      • Refutation
        • Q(b);
  • Actual
    • Q(J);
    • Threat
      • S(E)
    • Vars
      • K(h);OGATEB,P-FLIGHT,XP(C)::QAR1(J)
      • P(k);SBLOCK,XP(C)::QAR2(J)
      • Q(b);N_GUARD::QAB1(J),XQ(b)
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