MESON Chess Problem Database

Problem Display
PID: 7019 (1nNN1rB1/7P/p2P1pQ1/Rb2k2K/5p2/1PP5/1Br1P3/4R3 w - - 0 1)

Ulehla, Johann Viktor

Prize, Schach-Echo, 1935

1nNN1rB1/7P/p2P1pQ1/Rb2k2K/5p2/1PP5/1Br1P3/4R3

#2

13 + 8

14730 Problempalette II (Chlubna/Wenda) 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Rxe2#
      • 2.c4#
    • 1...Rxc3
      • 2.Bxc3#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sd7
      • 2.Sc6#
    • 1...f5
      • 2.Qe6#
  • Tries
    • 1.Be6?
      • threat
        • 2.Qf5#
      • 1...Rxc3
        • 2.Bxc3#
      • 1...f5!
    • 1.Qxc2?
      • threat
        • 2.c4#
      • 1...Sc6
        • 2.Sxc6#
      • 1...f3!
    • 1.Qe8+?
      • 1...Kf5
        • 2.Qe6#
      • 1...Rxe8!
    • 1.c4+?
      • 1...Rc3
        • 2.Bxc3#
      • 1...Rxb2!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qe4#
      • 1...Bxe2+
        • 2.Bf3#
      • 1...Kxd5
        • 2.Qf5#
      • 1...Rxe2
        • 2.c4#
      • 1...Bd3
        • 2.Bc4#
      • 1...Be8
        • 2.Bc6#
      • 1...f5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(a);OGATE,P_SPINR(a),XP(E)::B(B),XR(a)
    • S(g);N_GUARD::S(L),XS(g)
    • S(g);N_GUARD::S(L)
    • P(f);OGATE::QAR1(I)
  • Tries
    • Try
      • B(M);
      • Threat
        • QAR1(I)
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(E)::B(B),XR(a)
      • Refutation
        • P(f);
    • Try
      • Q(I);XR(a)
      • Threat
        • B(B)+P(E)
      • Vars
        • S(g);N_GUARD::S(L),XS(g)
      • Refutation
        • P(b);
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(I)
      • Refutation
        • R(h);XQ(I)
    • Try
      • P(E);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(B),XR(a)
      • Refutation
        • R(a);XB(B)
  • Actual
    • B(M);N_PINB(c)
    • Threat
      • QAR1(I)
    • Vars
      • B(c);CHECK,OGATEB,P_SPINB(c),XP(C)::R(F)+B(M)
      • K(d);P-FLIGHT,P_SPINB(c),XB(M)::QAR2(I)
      • R(a);N_GUARD,P_SPINR(a),XP(C)::B(B)+P(E)
      • B(c);OGATEB::R(F)+B(M)
      • B(c);OGATEB,P_PINQ(I)::R(F)+B(M)
      • P(f);OGATE::QAR1(I)
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