MESON Chess Problem Database

Problem Display
PID: 67583 (2R5/1Qn5/p7/P1NP4/pK1kP1N1/2p5/2P1r3/1R3Bb1 w - - 0 1)

Heyl, Peter

Troll, 2002

2R5/1Qn5/p7/P1NP4/pK1kP1N1/2p5/2P1r3/1R3Bb1

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Rd1#
    • 1...Sb5
      • 2.Qg7#
    • 1...Sxd5+
      • 2.Qxd5#
    • 1...Sa8
      • 2.Qg7#
  • Tries
    • 1.Se6+?
      • 1...Sxe6
        • 2.Rc4#
      • 1...Kxe4!
    • 1.Bxe2?
      • threat
        • 2.Rd1#
      • 1...Sxd5+
        • 2.Qxd5#
      • 1...Be3!
    • 1.Qxc7?
      • threat
        • 2.Qe5#
        • 2.Qg7#
      • 1...Rxe4
        • 2.Rd1#
      • 1...Rf2
        • 2.Qe5#
      • 1...Bh2!
  • Keys
    • 1.Kxa4!
      • threat
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Kxc5
        • 2.Qb4#
      • 1...Rxe4
        • 2.Sb3#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sb5
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD,XP(E)::R(A)
    • S(g);OGATE::QAB(J)
    • S(g);CHECK,OGATE,XP(I)::QAR1(J),XS(g)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • S(g);OGATE,XS(H)::R1(K)
      • Refutation
        • K(e);P-FLIGHT,XP(E)
    • Try
      • B(B);XR(b)
      • Threat
        • R(A)
      • Vars
        • S(g);CHECK,OGATE,XP(I)::QAR1(J),XS(g)
      • Refutation
        • B(a);
    • Try
      • Q(J);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);N_GUARD,XP(E)::R(A)
        • R(b);::QAB1(J)
      • Refutation
        • B(a);
  • Actual
    • K(D);P-FLIGHT,XP(d)
    • Threat
      • QAR2(J)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(b)::QAR1(J)
      • K(e);P_SPINS(g),S_FLIGHT,XS(H)::QAB1(J)
      • R(b);SBLOCK,XP(E)::S(H)
      • S(g);OGATE,XP(I)::QAR1(J),XS(g)
      • S(g);::R(A)
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