MESON Chess Problem Database

Problem Display
PID: 54912 (n3N3/3R4/Kp2kP2/3R2r1/1p1B3n/2b2p2/3p4/3Q4 w - - 0 1)

Burmistrov, Sergey Gennadevich

1st Prize, diagrammes, 1987

n3N3/3R4/Kp2kP2/3R2r1/1p1B3n/2b2p2/3p4/3Q4

#2

7 + 9

4640 Chess Wizardry: The New ABC of Chess Problems 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sg7#
      • 2.R5d6#
    • 1...Rh5
      • 2.Sg7#
    • 1...Rg7
      • 2.Sxg7#
    • 1...Sg6
      • 2.Sg7#
    • 1...Sc7+
      • 2.Sxc7#
  • Tries
    • 1.Qe2+?
      • 1...Re5
        • 2.Qxe5#
      • 1...fxe2!
    • 1.Qb3?
      • threat
        • 2.Re7#
      • 1...Sc7+
        • 2.Sxc7#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Rg7
        • 2.Sxg7#
      • 1...Sf5
        • 2.R5d6#
      • 1...Sg6
        • 2.Sg7#
      • 1...Re5!
    • 1.Qxf3?
      • threat
        • 2.R5d6#
        • 2.Re7#
      • 1...Sc7+
        • 2.Sxc7#
      • 1...Rxd5
        • 2.Re7#
        • 2.Qxd5#
      • 1...Bxd4
        • 2.Re7#
      • 1...Rg7
        • 2.Sxg7#
        • 2.R5d6#
        • 2.Qe2#
        • 2.Qe4#
        • 2.Qe3#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sg6
        • 2.Sg7#
        • 2.R5d6#
      • 1...Sxf3!
    • 1.Qa4?
      • threat
        • 2.Qc6#
      • 1...Sc7+
        • 2.Sxc7#
      • 1...Rxd5
        • 2.Sg7#
      • 1...Re5
        • 2.Rxe5#
      • 1...Sf5
        • 2.Re5#
      • 1...b5!
    • 1.Qb1?
      • threat
        • 2.R5d6#
      • 1...Sc7+
        • 2.Sxc7#
      • 1...Rxd5
        • 2.Re7#
      • 1...Sf5
        • 2.Qe4#
      • 1...Bxd4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.R5d6#
      • 1...Sc7+
        • 2.Sxc7#
      • 1...Rxd5
        • 2.Re7#
      • 1...Bxd4
        • 2.Qc6#
      • 1...Sf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD::S(G)
    • R(f);N_GUARD::S(G),XR(f)
    • S(e);S_CUTR(f)::S(G)
    • S(i);CHECK,N_GUARD::S(G),XS(i)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(A),XR(f)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • R1(F)
      • Vars
        • S(i);CHECK,N_GUARD::S(G),XS(i)
        • R(f);OGATE,P_SPINR(f),XR(C)::QAB1(A),XR(f)
        • R(f);N_GUARD::S(G),XR(f)
        • S(e);SBLOCK::QAB(A)+R(C),DCHECK
        • S(e);S_CUTR(f)::S(G)
      • Refutation
        • R(f);
    • Try
      • Q(A);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);CHECK,N_GUARD::S(G),XS(i)
        • B(b);XB(B)::R1(F)
        • S(e);S_CUTR(f)::QAR2(A)
      • Refutation
        • S(e);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(i);CHECK,N_GUARD::S(G),XS(i)
        • R(f);N_GUARD,XR(C)::S(G)
        • R(f);N_GUARD::R1(C),XR(f)
        • S(e);S_CUTR(f)::R1(C)
      • Refutation
        • P(g);
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • S(i);CHECK,N_GUARD::S(G),XS(i)
        • R(f);SBLOCK,XR(C)::R1(F)
        • S(e);S_CUTR(f)::QAR2(A)
      • Refutation
        • B(b);XB(B)
  • Actual
    • Q(A);
    • Threat
      • R1(C)
    • Vars
      • S(i);CHECK,N_GUARD::S(G),XS(i)
      • R(f);SBLOCK,XR(C)::R1(F)
      • B(b);OGATE,XB(B)::QAR2(A)
      • S(e);S_CUTR(f)::QAR2(A)
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