MESON Chess Problem Database

Problem Display
PID: 219937 (r1b5/3R1R2/2pb4/4k3/1pp2N2/P4p2/4pBBK/4Q3 w - - 0 1)

Meyer, Heinrich Friedrich Ludwig

English Mechanic and World of Science, 1875

(First published on Fri May 21 1875)

r1b5/3R1R2/2pb4/4k3/1pp2N2/P4p2/4pBBK/4Q3

#2

8 + 9

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxe2#
    • 1...fxg2
      • 2.Qxe2#
  • Tries
    • 1.Rde7+?
      • 1...Be6
        • 2.Rxe6#
      • 1...Bxe7!
    • 1.Rf5+?
      • 1...Ke4
        • 2.Qb1#
      • 1...Kxf5!
    • 1.Qd2?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Ke4
        • 2.Qe3#
        • 2.Qxe2#
        • 2.Qd4#
      • 1...Rxa3
        • 2.Qd4#
      • 1...e1Q
        • 2.Qxe1#
        • 2.Qd4#
      • 1...e1R
        • 2.Qxe1#
        • 2.Qd4#
      • 1...c5
        • 2.Qe3#
        • 2.Qd5#
      • 1...Bc5!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Bxf3#
        • 2.Qd4#
        • 2.Qe3#
      • 1...bxc3!
    • 1.Qa1+?
      • 1...Ke4
        • 2.Qd4#
      • 1...c3!
  • Keys
    • 1.Sxe2!
      • threat
        • 2.Sc3#
        • 2.Sf4#
      • 1...Ke4+
        • 2.Sf4#
      • 1...Kd5+
        • 2.Sf4#
      • 1...Ke6+
        • 2.Sf4#
      • 1...Rxa3
        • 2.Sc3#
      • 1...fxe2
        • 2.Qxe2#
      • 1...Bc5
        • 2.Sd4#
      • 1...c3
        • 2.Sxc3#
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(e);P-FLIGHT,P_PINS(F)::QAR2(A),XP(a)
    • P(b);N_GUARD,XB(C)::QAR(A),XP(a)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::R1(G),XB(i)
      • Refutation
        • B(g);XR(G)
    • Try
      • R(H);CHECK
      • Vars
        • K(e);P-FLIGHT,P_PINS(F)::QAB(A)
      • Refutation
        • K(e);N_SPINP(a),P-FLIGHT,P_PINS(F),XR(H)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XP(E)::QAB1(A)
      • Refutation
        • B(g);
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(e);P-FLIGHT,P_PINS(F),P_SPINP(b)::QAR1(A)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • S(F);XP(a)
    • Threat
      • DUALS(2)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINP(b)::QAR(A)+S(F)
      • K(e);CHECK,P-FLIGHT,P_SPINB(g),P_SPINP(b)::S(F)
      • K(e);CHECK,P-FLIGHT::QAR(A)+S(F),DCHECK
      • R(h);XP(E)::QAR(A)+S(F)
      • P(b);OGATE,P_SPINP(b),XS(F)::QAR(A),XP(b)
      • B(g);::QAR(A)+S(F)
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