MESON Chess Problem Database

Problem Display
PID: 153230 (8/4N2b/2rp1P1K/4p3/4kBNR/1r2P1pp/3R4/5Qn1 w - - 0 1)

Rice, John Michael

2nd Place, Jesi, 2011

8/4N2b/2rp1P1K/4p3/4kBNR/1r2P1pp/3R4/5Qn1

#2

9 + 9

145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...exf4
      • 2.Rd4#
      • 2.Qxf4#
  • Tries
    • 1.Sh2?
      • threat
        • 2.Bg5#
      • 1...exf4
        • 2.Qxf4#
      • 1...Se2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Bf5!
    • 1.Bg5?
      • threat
        • 2.Sh2#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sf3
        • 2.Sf2#
      • 1...h2
        • 2.Sxh2#
      • 1...Se2!
    • 1.f7?
      • threat
        • 2.Sf6#
      • 1...exf4
        • 2.Rd4#
        • 2.Qxf4#
      • 1...d5+!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Rd4#
      • 1...Rxe3
        • 2.Bxg3#
      • 1...dxe5
        • 2.Bg5#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rb4
        • 2.Qd3#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Se2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • R(F)+B(D)
      • Vars
        • P(f);OGATE,P_SPINP(f),XB(D)::QAR1(A),XP(f)
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • B(i);
    • Try
      • B(D);
      • Threat
        • R(F)+S(E)
      • Vars
        • B(i);N_GUARD::QAB1(A),XB(i)
        • S(a);SBLOCK::R(F)+S(E),DCHECK
        • P(d);::R(F)+S(E),XP(d)
      • Refutation
        • S(a);
    • Try
      • P(G);
      • Threat
        • S(E)
      • Refutation
        • P(h);CHECK
  • Actual
    • S(E);XP(f)
    • Threat
      • R1(B)
    • Vars
      • R(b);SBLOCK,XP(C)::R(F)+B(D),XP(c)
      • P(h);P_PINP(G),SBLOCK,XS(E)::R(F)+B(D)
      • R(b);N_GUARD::QAB1(A),XR(b)
      • R(b);N_GUARD::QAB1(A)
      • R(g);N_GUARD::QAR2(A),XR(g)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
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