MESON Chess Problem Database

Problem Display
PID: 45956 (3R4/8/4NB1p/2PN3P/1Q1rk1K1/1B2bR2/1P1ppp2/3nn3 w - - 0 1)

Burger, Robert Eugene

7th Place, Match: Great Britain - USA, 2001-2002

3R4/8/4NB1p/2PN3P/1Q1rk1K1/1B2bR2/1P1ppp2/3nn3

#2

11 + 9

56 The Problemist 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3+
      • 2.Qxd4#
    • 1...Bf4
      • 2.Qxd4#
    • 1...Bg5
      • 2.Qxd4#
    • 1...Sxb2
      • 2.Rxe3#
    • 1...Sc3
      • 2.Rxe3#
    • 1...Sc2
      • 2.Bxc2#
    • 1...Sg2
      • 2.Bc2#
    • 1...Sxf3
      • 2.Bc2#
  • Tries
    • 1.Sc3+?
      • 1...Kd3+
        • 2.Sf4#
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Sxc3!
    • 1.Sdf4?
      • threat
        • 2.Bd5#
      • 1...Rc4
        • 2.Qb7#
      • 1...Sc3!
    • 1.Sef4?
      • threat
        • 2.Re8#
      • 1...Bxf4
        • 2.Qxd4#
      • 1...Sxf3
        • 2.Bc2#
      • 1...Sd3!
    • 1.Sg5+?
      • 1...Kd3+
        • 2.Sf4#
        • 2.Qxd4#
      • 1...Bxg5
        • 2.Re8#
        • 2.Qxd4#
      • 1...hxg5!
    • 1.Rf4+?
      • 1...Bxf4
        • 2.Qxd4#
      • 1...Kd3!
    • 1.Re8?
      • threat
        • 2.Sef4#
      • 1...Kd3+
        • 2.Qxd4#
      • 1...Bf4
        • 2.Sexf4#
        • 2.Sg5#
        • 2.Qxd4#
      • 1...Sd3
        • 2.Sg5#
      • 1...Sxf3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qh7#
      • 1...Kd3+
        • 2.Sdf4#
      • 1...Rxd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • K(h);CHECK,N_SPINR(g),P_SPINB(f),S_FLIGHT::QAR1(D),XR(g)
    • B(f);N_GUARD::QAR1(D),XR(g)
    • S(a);N_GUARD,XP(A)::R1(C),XB(f)
    • S(a);N_GUARD::R1(C),XB(f)
    • S(b);N_GUARD::B(B),XS(b)
    • S(b);N_GUARD::B(B)
    • S(b);N_GUARD,XR(C)::B(B)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XS(G)
    • Try
      • S(G);
      • Threat
        • B(B)
      • Vars
        • R(g);N_GUARD::QAB(D)
      • Refutation
        • S(a);
    • Try
      • S(I);
      • Threat
        • R(K)
      • Vars
        • B(f);N_GUARD,XS(I)::QAR1(D),XR(g)
        • S(b);N_GUARD,XR(C)::B(B)
      • Refutation
        • S(b);
    • Try
      • S(I);CHECK
      • Refutation
        • P(i);XS(I)
    • Try
      • R(C);CHECK
      • Vars
        • B(f);XR(C)::QAR1(D),XR(g)
      • Refutation
        • K(h);N_SPINR(g),P_PINR(C),S_FLIGHT
    • Try
      • R(K);
      • Threat
        • R(K)+S(I)
      • Vars
        • K(h);CHECK,N_SPINR(g),P_SPINB(f),S_FLIGHT::QAR1(D),XR(g)
        • S(b);SBLOCK::R(K)+S(I),DCHECK
      • Refutation
        • S(b);XR(C)
  • Actual
    • Q(D);N_PINR(g)
    • Threat
      • QAB(D)
    • Vars
      • K(h);CHECK,P_SPINB(f),S_FLIGHT::S(G)
      • R(g);OGATE,P_SPINR(g),XS(G)::QAB1(D),XR(g)
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