MESON Chess Problem Database

Problem Display
PID: 37999 (qrb3B1/p1Qp4/3P4/p1N5/3k1PKp/R1bP2nR/1n1NpP2/4B3 w - - 0 1)

Erokhin, Vladimir Alekseevich

Hlas l'udu, 1992

qrb3B1/p1Qp4/3P4/p1N5/3k1PKp/R1bP2nR/1n1NpP2/4B3

#2

12 + 12

3705 Album Russia (1992-1994) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3+
      • 2.Sxf3#
    • 1...Rb3
      • 2.Sdxb3#
    • 1...Rb7
      • 2.Sf3#
    • 1...Bb4
      • 2.Sdb3#
    • 1...Bb7
      • 2.Sdb3#
    • 1...Se4
      • 2.Sf3#
  • Tries
    • 1.Se6+?
      • 1...Kxd3
        • 2.Rxc3#
        • 2.Qxc3#
      • 1...Kd5
        • 2.Qc5#
      • 1...dxe6!
    • 1.Ra4+?
      • 1...Rb4
        • 2.Sdb3#
      • 1...Bb4
        • 2.Sdb3#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sxa4!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Qxc3#
      • 1...Kxd3
        • 2.Qxc3#
      • 1...Bxd2
        • 2.Qc5#
      • 1...Bb4
        • 2.Sf3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Se4
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(j);CHECK,N_GUARD::S(B),XQ(j)
    • R(k);N_GUARD::S(B),XR(k)
    • R(k);S_CUTQ(j)::S(B)
    • B(c);S_CUTR(k)::S(B)
    • B(l);S_CUTR(k)::S(B)
    • S(d);S_CUTQ(j)::S(B)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(K)
      • Refutation
        • P(i);XS(I)
    • Try
      • R(D);CHECK
      • Vars
        • R(k);P_SPINR(k)::S(B)
        • B(c);P_SPINB(c)::S(B)
        • S(a);N_GUARD,P_SPINS(a)::R1(D),XS(a)
      • Refutation
        • S(a);XR(D)
  • Actual
    • S(I);
    • Threat
      • QAB1(K),XB(c)
    • Vars
      • K(e);P-FLIGHT,P_SPINB(c),P_SPINS(d),XP(E)::QAR1(K),XB(c)
      • B(c);XS(B)::QAB1(K)
      • B(c);::S(B)
      • S(a);N_GUARD::QAR1(K)
      • S(a);N_GUARD::QAR1(K),XS(a)
      • S(d);::S(B)
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