MESON Chess Problem Database

Problem Display
PID: 94864 (6N1/3p3p/q1pNk2K/2nRB1Rp/2Qn2P1/1p5B/2p1b3/b7 w - - 0 1)

Paros, Gyorgy

British Chess Magazine, 1939

6N1/3p3p/q1pNk2K/2nRB1Rp/2Qn2P1/1p5B/2p1b3/b7

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.gxh5#
    • 1...Sb5
      • 2.Rd3#
    • 1...Sf5+
      • 2.gxf5#
    • 1...Sd3
      • 2.Rb5#
  • Tries
    • 1.Rxd4+?
      • 1...Bxc4
        • 2.gxh5#
      • 1...Qxc4!
    • 1.gxh5+?
      • 1...Sf5+
        • 2.Bxf5#
      • 1...Bg4!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Rge5#
      • 1...Sf5+
        • 2.gxf5#
      • 1...cxd5
        • 2.Qxd5#
      • 1...Sf3
        • 2.gxh5#
      • 1...Sb5
        • 2.Rd3#
      • 1...Sd3
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD,S_CUTB(c)::B(A)+P(C),XP(g)
    • S(e);OGATE::QAB(B)+R(D)
    • S(e);CHECK,OGATE::P(C),XS(e)
    • S(f);OGATE::QAB(B)+R(D)
  • Tries
    • Try
      • R(D);CHECK,XS(e)
      • Vars
        • B(c);XQ(B)::B(A)+P(C),XP(g)
      • Refutation
        • Q(h);XQ(B)
    • Try
      • P(C);CHECK,XP(g)
      • Vars
        • S(e);CHECK,N_GUARD,P_SPINS(e)::B(A),XS(e)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • B(E);
    • Threat
      • R1(F)
    • Vars
      • S(e);CHECK,OGATE::P(C),XS(e)
      • P(i);OGATE,P_SPINP(i),XR(D)::QAB1(B),XP(i)
      • S(e);N_GUARD,S_CUTB(c)::B(A)+P(C),XP(g)
      • S(e);OGATE::QAB(B)+R(D)
      • S(f);OGATE::QAB(B)+R(D)
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