MESON Chess Problem Database

Problem Display
PID: 222740 (5nRb/3prp1B/5Bq1/3Nr2R/1p2k1p1/8/2P2PpN/2KQ1b2 w - - 0 1)

Evans, TC

British Chess Magazine, 1930

5nRb/3prp1B/5Bq1/3Nr2R/1p2k1p1/8/2P2PpN/2KQ1b2

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Rxg4#
    • 1...Qxh7
      • 2.Rxg4#
    • 1...Rxd5
      • 2.Qxg4#
    • 1...Rf5
      • 2.Qd4#
    • 1...R5e6
      • 2.Qxg4#
      • 2.Qd4#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Se6
      • 2.Rxe5#
    • 1...g3
      • 2.f3#
  • Keys
    • 1.Rf5!
      • threat
        • 2.Rf4#
      • 1...Kxf5
        • 2.Qxg4#
      • 1...Qxf5
        • 2.Rxg4#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Rxf5
        • 2.Qd4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Se6
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(g);OGATE::R(J),XP(e)
    • Q(g);N_SPINQ(g),OGATE,XB(I)::R(J),XP(e)
    • R(f);XS(F)::QAR2(B),XP(e)
    • R(f);N_SPINQ(g)::QAR1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • S(k);S_CUTR(i)::R1(G),XR(f)
    • P(e);N_GUARD::P(D)
  • Actual
    • R(G);N_PINQ(g)
    • Threat
      • R1(G)
    • Vars
      • K(d);P_SPINQ(g),S_FLIGHT,XR(G)::QAB1(B),XP(e)
      • Q(g);OGATE,P_SPINQ(g),XR(G)::R(J),XP(e)
      • R(f);OGATE,XS(F)::QAB1(B),XR(f)
      • R(f);SBLOCK,XR(G)::QAR1(B)
      • B(a);N_GUARD::QAB1(B),XB(a)
      • S(k);S_CUTR(i)::R1(G),XR(f)
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