MESON Chess Problem Database

Problem Display
PID: 235037 (8/8/4p1bq/1Np4p/2Q5/P2N1R2/KB1knpP1/nR3B2 w - - 0 1)

Erokhin, Vladimir Alekseevich

Hlas l'udu, 1992

8/8/4p1bq/1Np4p/2Q5/P2N1R2/KB1knpP1/nR3B2

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd3
      • 2.Rxd3#
      • 2.Qxd3#
    • 1...Sc1+
      • 2.Qxc1#
    • 1...Sg1
      • 2.Qc1#
      • 2.Qc3#
    • 1...Sc3+
      • 2.Qxc3#
    • 1...Sg3
      • 2.Qc1#
      • 2.Qc3#
    • 1...Sd4
      • 2.Qc1#
      • 2.Qc3#
    • 1...Sf4
      • 2.Qc1#
      • 2.Qc3#
  • Tries
    • 1.Sxf2?
      • threat
        • 2.Rd1#
        • 2.Qxe2#
      • 1...Sc1+
        • 2.Qxc1#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Qe3
        • 2.Rd1#
      • 1...Bc2
        • 2.Qxe2#
      • 1...Bd3
        • 2.Rd1#
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Sg1
        • 2.Rd1#
        • 2.Qc1#
        • 2.Qc3#
      • 1...Sg3
        • 2.Rd1#
        • 2.Qc1#
        • 2.Qc3#
      • 1...Sd4
        • 2.Rd1#
        • 2.Qc1#
        • 2.Qc3#
      • 1...Sf4
        • 2.Rd1#
        • 2.Qc1#
        • 2.Qc3#
      • 1...Bxb1+!
    • 1.Sf4?
      • threat
        • 2.Qxe2#
      • 1...Sc1+
        • 2.Qxc1#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sxf4
        • 2.Qc1#
        • 2.Qc3#
      • 1...Bd3
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Sg1
        • 2.Qc1#
        • 2.Qc3#
      • 1...Sg3
        • 2.Qc1#
        • 2.Qc3#
      • 1...Sd4
        • 2.Qc1#
        • 2.Qc3#
      • 1...Bxb1+!
    • 1.Bc1+?
      • 1...Sxc1+
        • 2.Qxc1#
      • 1...Kd1!
    • 1.Bc3+?
      • 1...Sxc3+
        • 2.Qxc3#
      • 1...Kc2!
  • Keys
    • 1.Rxf2!
      • threat
        • 2.Rxe2#
      • 1...Ke3
        • 2.Rxe2#
      • 1...Bxd3
        • 2.Qc1#
      • 1...Qe3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(c);CHECK,N_GUARD::QAB1(I),XS(c)
  • Tries
    • Try
      • S(G);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);CHECK,N_GUARD::QAB1(I),XS(c)
        • Q(i);::R1(A)
        • B(h);SBLOCK::QAR1(I),XS(c)
      • Refutation
        • B(h);CHECK,XR(A)
    • Try
      • S(G);
      • Threat
        • QAR1(I),XS(c)
      • Vars
        • S(c);CHECK,N_GUARD::QAB1(I),XS(c)
      • Refutation
        • B(h);CHECK,XR(A)
    • Try
      • B(D);CHECK
      • Vars
        • S(c);CHECK,OGATE,XB(D)::QAB1(I),XS(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • S(c);CHECK,OGATE,XB(D)::QAB1(I),XS(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(H);P_PINS(c),XP(d)
    • Threat
      • R1(H),XS(c)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT::R1(H),XS(c)
      • B(h);SBLOCK,XS(G)::QAB1(I)
      • Q(i);SBLOCK::QAB1(I)
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