MESON Chess Problem Database

Problem Display
PID: 79683 (5r2/BRp2P2/2b3Q1/3kP3/P1N2p2/1pp3Pr/3pPN1p/5B1K w - - 0 1)

Retter, Yosef

1/3 Prize, Spisska Borovicka, 2007

5r2/BRp2P2/2b3Q1/3kP3/P1N2p2/1pp3Pr/3pPN1p/5B1K

#2

12 + 10

721 Variantim 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4+
      • 2.Qxc6#
      • 2.e4#
    • 1...Rxf7
      • 2.Qxf7#
    • 1...Rg8
      • 2.fxg8Q#
      • 2.fxg8B#
    • 1...fxg3
      • 2.e4#
    • 1...f3
      • 2.e4#
  • Tries
    • 1.Bg2+?
      • 1...Kxc4
        • 2.Qd3#
        • 2.Qxc6#
      • 1...f3!
    • 1.Rb5+?
      • 1...Kxc4+
        • 2.Qxc6#
        • 2.e4#
      • 1...Bxb5!
    • 1.Rxc7?
      • threat
        • 2.Qxc6#
      • 1...Kxc4+
        • 2.Qe4#
      • 1...Bxa4
        • 2.Qd6#
      • 1...Bb5
        • 2.Qd6#
      • 1...Bb7
        • 2.Qd6#
      • 1...Bd7
        • 2.Qd6#
      • 1...Ba8
        • 2.Qd6#
      • 1...Be8
        • 2.Qd6#
      • 1...Rh6!
    • 1.Qd6+?
      • 1...Kxc4+
        • 2.Qxc6#
        • 2.e4#
      • 1...cxd6!
    • 1.gxf4?
      • threat
        • 2.e4#
      • 1...Kxc4+
        • 2.Qxc6#
      • 1...Re3
        • 2.Sxe3#
      • 1...Rd3!
  • Keys
    • 1.e6!
      • threat
        • 2.Qe4#
      • 1...Kxc4+
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(j);OGATE,XP(L)::QAB(I),XR(j)
    • R(j);OGATE::PXR(j)=Q
    • P(f);N_GUARD,XP(E)::P(C)
    • P(f);N_GUARD::P(C)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • R(K);CHECK
      • Refutation
        • B(h);XR(K)
    • Try
      • R(K);XP(i)
      • Threat
        • QAB1(I),XB(h)
      • Vars
        • K(g);CHECK,P_SPINB(h),S_FLIGHT,XS(G)::QAR2(I)
        • B(h);XP(F)::QAR1(I)
        • B(h);::QAR1(I)
      • Refutation
        • R(e);
    • Try
      • Q(I);CHECK
      • Refutation
        • P(i);XQ(I)
    • Try
      • P(E);XP(f)
      • Threat
        • P(C)
      • Vars
        • K(g);CHECK,S_FLIGHT,XS(G)::QAR2(I),XB(h)
        • R(e);N_GUARD::S(G),XR(e)
      • Refutation
        • R(e);
  • Actual
    • P(H);
    • Threat
      • QAB1(I)
    • Vars
      • K(g);CHECK,S_FLIGHT,XS(G)::B(A)+P(C)
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