MESON Chess Problem Database

Problem Display
PID: 186754 (8/4K1p1/4pR2/2N1p3/p2P1B1P/5k1P/Q3rpNR/2nB1b2 w - - 0 1)

Degener, Udo

Troll, 2018

8/4K1p1/4pR2/2N1p3/p2P1B1P/5k1P/Q3rpNR/2nB1b2

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Bxe5#
    • 1...g6
      • 2.Bxe5#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sd2#
        • 2.Sg5#
      • 1...exf4
        • 2.Rxf4#
      • 1...gxf6
        • 2.Sd2#
      • 1...Sb3
        • 2.Sg5#
      • 1...g5
        • 2.Sd2#
        • 2.Sxg5#
      • 1...Kxe4!
    • 1.Bxc1+?
      • 1...gxf6
        • 2.Qa3#
      • 1...Kg3!
    • 1.Qb1?
      • threat
        • 2.Qe4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...e4
        • 2.Qxe4#
      • 1...exf4!
    • 1.Qd5+?
      • 1...e4
        • 2.Qxe4#
        • 2.Qh5#
      • 1...exd5!
    • 1.Qc2?
      • threat
        • 2.Qe4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...e4
        • 2.Qxe4#
      • 1...exf4!
    • 1.Qa3+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sb3!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Qg4#
      • 1...exd4
        • 2.Qe4#
      • 1...exf4
        • 2.Qe3#

This is after

After A P Eerkes.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(i);N_GUARD::R(J)+B(G),XP(g)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);OGATE,P_SPINP(g),XB(G)::R1(J),XP(g)
        • P(i);XR(J)::S(I)
        • S(a);::S(I)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT,XS(I)
    • Try
      • B(G);CHECK,XS(a)
      • Vars
        • P(i);XR(J)::QAR(B)
      • Refutation
        • K(e);N_SPINR(c),P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD::QAR2(B),XS(a)
        • P(g);::QAB1(B),XP(g)
      • Refutation
        • P(g);P_SPINP(g),XB(G)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(h);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD::QAR2(B),XS(a)
        • P(g);::QAB1(B),XP(g)
      • Refutation
        • P(g);P_SPINP(g),XB(G)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(B);XP(h)
    • Threat
      • QAB1(B)
    • Vars
      • P(g);OGATE,P_PINQ(B),XP(F)::QAB1(B)
      • P(g);OGATE,P_PINQ(B),P_SPINP(g),XB(G)::QAR1(B)
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