MESON Chess Problem Database

Problem Display
PID: 132339 (br1n3R/BkpR4/pP6/p7/P1r1p3/4P3/4Q3/5BK1 w - - 0 1)

Bettmann, Henry Wald

La Strategie, 1908-1910

br1n3R/BkpR4/pP6/p7/P1r1p3/4P3/4Q3/5BK1

#2

9 + 9

1829 The Theory of Pawn Promotion 1912

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Rxc7#
    • 1...Rb4
      • 2.Rxc7#
    • 1...Rd4
      • 2.Rxc7#
    • 1...Rc6
      • 2.Qxa6#
    • 1...Sc6
      • 2.Rxc7#
  • Tries
    • 1.Qxc4?
      • threat
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Kc8
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Sc6
        • 2.Rxc7#
        • 2.Qxa6#
      • 1...Se6
        • 2.Rxb8#
        • 2.Qd5#
        • 2.Qxe4#
      • 1...Rc8!
  • Keys
    • 1.bxc7!
      • 1...Kc6
        • 2.cxb8S#
      • 1...Kxa7
        • 2.c8S#
      • 1...Kc8
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Rxa4
        • 2.Qxa6#
      • 1...Rxc7
        • 2.Qxa6#
      • 1...Rc1
        • 2.Qxa6#
      • 1...Rc2
        • 2.Qxa6#
      • 1...Rc3
        • 2.Qxa6#
      • 1...Rb4
        • 2.Qxa6#
      • 1...Rd4
        • 2.Qxa6#
      • 1...Rc5
        • 2.Qxa6#
      • 1...Rc6
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Rc8
        • 2.cxd8S#
      • 1...Sc6
        • 2.cxb8Q#
        • 2.cxb8S#
        • 2.cxb8B#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8S#
        • 2.c8B#
        • 2.c8R#
      • 1...Se6
        • 2.c8Q#
      • 1...Sf7
        • 2.c8Q#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD,XP(E)::R1(H),XP(f)
    • R(a);N_GUARD::R1(H),XP(f)
    • R(a);OGATE,SBLOCK::QAB1(C),XP(d)
    • S(i);S_CUTR(a)::R1(H),XP(f)
  • Tries
    • Try
      • Q(C);XR(a)
      • Threat
        • DUALS(2)
      • Refutation
        • R(h);
  • Actual
    • P(F);XP(f)
    • Vars
      • K(e);S_FLIGHT::PXR(h)=S
      • K(e);P-FLIGHT,XB(G)::P=S
      • K(e);P_SPINS(i),S_FLIGHT::PXS(i)=Q
      • R(a);OGATE,XP(E)::QAB1(C),XP(d)
      • R(a);OGATE,P_SPINR(a),XP(F)::QAB1(C),XP(d)
      • R(a);OGATE,P_PINB(A)::QAB1(C),XP(d)
      • R(a);OGATE::QAB1(C),XP(d)
      • R(a);SBLOCK::PXR(h)=Q
      • R(h);SBLOCK::PXS(i)=S
      • S(i);::P=Q
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