MESON Chess Problem Database

Problem Display
PID: 218484 (4n3/3Q4/4p1p1/2p1k1n1/3rP1B1/K1NP2P1/1N6/B3R3 w - - 0 1)

Rowland, Thomas B

English Mechanic and World of Science, 1882

(First published on Fri Jul 28 1882)

4n3/3Q4/4p1p1/2p1k1n1/3rP1B1/K1NP2P1/1N6/B3R3

#2

10 + 7

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.e5#
    • 1...Sf3
      • 2.Qxe6#
    • 1...Sh3
      • 2.Qxe6#
    • 1...Sxe4
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qxe6#
    • 1...Sh7
      • 2.Qxe6#
    • 1...Sd6
      • 2.Qg7#
  • Tries
    • 1.Sc4+?
      • 1...Kf6
        • 2.e5#
      • 1...Rxc4!
    • 1.Sd5?
      • threat
        • 2.Sc4#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Ra4+
        • 2.Sxa4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Sd6
        • 2.Qg7#
      • 1...c4
        • 2.Sxc4#
      • 1...exd5!
  • Keys
    • 1.Sb5!
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Ra4+
        • 2.Sxa4#
      • 1...Kf6
        • 2.e5#
      • 1...Rxe4
        • 2.Sd1#
        • 2.Sa4#
        • 2.Sc4#
      • 1...Rxd7
        • 2.Sc4#
      • 1...Sxe4
        • 2.Qxe6#
      • 1...Sc7
        • 2.Qg7#
      • 1...Rb4
        • 2.Sc4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Rd5
        • 2.Sc4#
      • 1...Rd6
        • 2.Sc4#
      • 1...Sf3
        • 2.Qxe6#
      • 1...Sh3
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qxe6#
      • 1...Sh7
        • 2.Qxe6#
      • 1...Sd6
        • 2.Qg7#
      • 1...Sf6
        • 2.Sc4#
      • 1...Sg7
        • 2.Qxg7#
      • 1...c4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATE,S_FLIGHT::P(H)
    • S(d);N_GUARD::QAR1(J),XP(e)
    • S(d);N_GUARD,P_SPINS(d),XP(H)::QAR1(J),XP(e)
    • S(g);N_GUARD,SBLOCK::QAB(J)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::P(H)
      • Refutation
        • R(a);XS(C)
    • Try
      • S(E);
      • Threat
        • S(C)
      • Vars
        • R(a);CHECK,XP(F)::B(A)+S(C),DCHECK,XR(a)
        • R(a);CHECK::B(A)+S(C),XR(a)
        • R(a);::B(A)+S(C),DCHECK,XR(a)
        • S(g);N_GUARD,SBLOCK::QAB(J)
        • P(b);::S(C),XP(b)
      • Refutation
        • P(e);XS(E)
  • Actual
    • S(E);
    • Vars
      • R(a);CHECK,XP(F)::B(A)+S(C),DCHECK,XR(a)
      • R(a);CHECK::B(A)+S(C),XR(a)
      • K(c);OGATE,S_FLIGHT::P(H)
      • R(a);XQ(J)::B(A)+S(C),DCHECK
      • S(d);N_GUARD,P_SPINS(d),XP(H)::QAR1(J),XP(e)
      • S(g);N_GUARD::QAB(J)
      • R(a);::B(A)+S(C),DCHECK
      • R(a);::B(A)+S(C),DCHECK,XR(a)
      • S(d);N_GUARD::QAR1(J),XP(e)
      • S(g);SBLOCK::S(C)
      • S(g);N_GUARD::QAB(J),XS(g)
      • P(b);N_GUARD::QAB1(J),XR(a)
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