MESON Chess Problem Database

Problem Display
PID: 159915 (2R5/8/3Pr2p/2P5/KNk3r1/2ppp2q/1pNP2p1/3Q4 w - - 0 1)

Anonymous

BCPJ (August), 1919

2R5/8/3Pr2p/2P5/KNk3r1/2ppp2q/1pNP2p1/3Q4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sa3#
    • 1...Rxd6
      • 2.cxd6#
  • Tries
    • 1.Qxg4+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Qxg4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxd3#
      • 1...Rxd6
        • 2.cxd6#
      • 1...dxe2
        • 2.d3#
      • 1...exd2
        • 2.Qxe6#
      • 1...Rd4
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(h);SBLOCK::S(B)
    • R(i);OGATE,XP(G)::R(H)+P(F),XR(i)
  • Tries
    • Try
      • Q(A);CHECK,XR(h)
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR2(A),XR(i)
      • Refutation
        • Q(f);XQ(A)
  • Actual
    • Q(A);P_PINP(d)
    • Threat
      • QAB1(A),XP(d)
    • Vars
      • R(i);OGATE,XP(G)::R(H)+P(F),XR(i)
      • P(d);N_SPINP(d),OGATE,XQ(A)::P(C)
      • P(e);OGATE,XP(C)::QAB(A),XR(i)
      • R(h);SBLOCK::S(B)
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