MESON Chess Problem Database

Problem Display
PID: 235642 (1Q5N/2ppp2K/4kp1n/1N2B2R/1p2Bp2/3n4/p7/bbrR4 w - - 0 1)

Erokhin, Vladimir Alekseevich

2nd HM., Pat a Mat, 1992

1Q5N/2ppp2K/4kp1n/1N2B2R/1p2Bp2/3n4/p7/bbrR4

#2

8 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd1
      • 2.Sxc7#
    • 1...Rc3
      • 2.Sd4#
    • 1...Bc3
      • 2.Sxc7#
    • 1...Bd4
      • 2.Sxd4#
    • 1...Bc2
      • 2.Sxc7#
    • 1...Sb2
      • 2.Sd4#
    • 1...Sc5
      • 2.Sxc7#
    • 1...Sg4
      • 2.Qg8#
    • 1...Sg8
      • 2.Qxg8#
    • 1...fxe5
      • 2.Rxh6#
    • 1...c5
      • 2.Sc7#
    • 1...c6
      • 2.Sc7#
    • 1...d5
      • 2.Qc8#
    • 1...d6
      • 2.Qc8#
  • Tries
    • 1.Qg8+?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sxg8!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Bd5#
      • 1...d5
        • 2.Qc8#
      • 1...d6
        • 2.Qc8#
      • 1...Se1
        • 2.Sxc7#
      • 1...Sb2
        • 2.Sxc7#
      • 1...Sf2
        • 2.Sxc7#
      • 1...Sc5
        • 2.Sxc7#
      • 1...Se5
        • 2.Sxc7#
      • 1...Sf5
        • 2.Qg8#
      • 1...f5
        • 2.Rxh6#
      • 1...c6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • R(c);N_GUARD,XR(A)::S(C),XP(k)
    • R(c);S_CUTB(a)::S(C)
    • B(a);S_CUTR(c)::S(C),XP(k)
    • B(a);N_GUARD::S(C),XB(a)
    • B(b);S_CUTR(c)::S(C),XP(k)
    • S(e);P_PINB(B),S_CUTB(a)::S(C)
    • S(e);P_PINB(B),S_CUTR(c)::S(C),XP(k)
    • S(j);N_GUARD::QAB(G)
    • S(j);N_GUARD::QAB(G),XS(j)
    • P(i);OGATEB,SBLOCK,XB(D)::R(E),XS(j)
    • P(k);S_CUTR(c)::S(C)
    • P(l);OGATEB::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAB1(G),XS(j)
      • Refutation
        • S(j);XQ(G)
  • Actual
    • B(D);
    • Threat
      • B(B)
    • Vars
      • P(l);OGATEB::QAB(G)
      • S(e);P_PINB(B)::S(C),XP(k)
      • S(j);N_GUARD::QAB(G)
      • P(i);OGATEB::R(E),XS(j)
      • P(k);::S(C)
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