MESON Chess Problem Database

Problem Display
PID: 243782 (8/8/1p2p3/4K1B1/1N2NpB1/1P2k1p1/Q1pp2n1/2R4R w - - 0 1)

Uppstrom, Rolf

Tidskrift for Schack, 1981

8/8/1p2p3/4K1B1/1N2NpB1/1P2k1p1/Q1pp2n1/2R4R

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Bxf4#
    • 1...Sh4
      • 2.Bxf4#
    • 1...b5
      • 2.Qa7#
  • Tries
    • 1.Sd5+?
      • 1...Kd3
        • 2.Qxc2#
      • 1...exd5!
    • 1.Rxc2?
      • threat
        • 2.Rc3#
      • 1...d1S
        • 2.Re2#
      • 1...d1R
        • 2.Re2#
      • 1...Se1
        • 2.Bxf4#
      • 1...d1Q!
    • 1.Qxc2?
      • threat
        • 2.Qd3#
        • 2.Qxd2#
        • 2.Qc3#
      • 1...dxc1Q
        • 2.Qd3#
        • 2.Qxc1#
        • 2.Qe2#
      • 1...dxc1S
        • 2.Qxc1#
        • 2.Qd2#
      • 1...dxc1B
        • 2.Qd3#
        • 2.Qxc1#
        • 2.Qe2#
        • 2.Qc3#
      • 1...dxc1R
        • 2.Qd3#
        • 2.Qxc1#
        • 2.Qd2#
        • 2.Qe2#
      • 1...d1S
        • 2.Qd3#
        • 2.Qd2#
        • 2.Qe2#
      • 1...d1B
        • 2.Qd3#
        • 2.Qd2#
        • 2.Qc3#
      • 1...d1R
        • 2.Qe2#
      • 1...Se1
        • 2.Bxf4#
        • 2.Qxd2#
      • 1...d1Q!
    • 1.Qa6?
      • threat
        • 2.Sxc2#
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qxb6#
      • 1...dxc1Q
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qxb6#
      • 1...dxc1S
        • 2.Sxc2#
        • 2.Qxb6#
      • 1...dxc1R
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qxb6#
      • 1...d1B
        • 2.Qd3#
        • 2.Qxb6#
      • 1...d1R
        • 2.Sxc2#
        • 2.Qe2#
      • 1...Se1
        • 2.Bxf4#
        • 2.Qe2#
        • 2.Qxb6#
      • 1...b5
        • 2.Qb6#
        • 2.Qa7#
      • 1...d1Q!
  • Keys
    • 1.Rhd1!
      • 1...cxd1Q
        • 2.Rc3#
      • 1...cxd1S
        • 2.Qxd2#
      • 1...cxd1B
        • 2.Rc3#
        • 2.Qxd2#
      • 1...cxd1R
        • 2.Rc3#
      • 1...dxc1Q
        • 2.Rd3#
      • 1...dxc1S
        • 2.Sxc2#
      • 1...dxc1B
        • 2.Sxc2#
        • 2.Rd3#
      • 1...dxc1R
        • 2.Rd3#
      • 1...Se1
        • 2.Bxf4#
      • 1...Sh4
        • 2.Bxf4#
      • 1...b5
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::B(I),XP(f)
    • P(g);OGATEB::QAB(C)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);N_SPINP(f),P-FLIGHT::QAB1(C),XP(a)
      • Refutation
        • P(h);XS(E)
    • Try
      • R(A);XP(a)
      • Threat
        • R(A)
      • Vars
        • P(b);OGATE::R1(A)
        • S(c);N_GUARD::B(I),XP(f)
      • Refutation
        • P(b);
    • Try
      • Q(C);XP(a)
      • Threat
        • DUALS(3)
      • Vars
        • P(b);OGATE::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Refutation
        • P(b);
  • Actual
    • R(B);
    • Vars
      • P(a);OGATE,XR(B)::R(A)
      • P(a);OGATE,XR(B)::QAB1(C),XP(b)
      • P(b);OGATE,XR(A)::R1(B)
      • P(b);XR(A)::S(E),XP(a)
      • S(c);N_GUARD::B(I),XP(f)
      • P(g);OGATEB::QAB(C)
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