MESON Chess Problem Database

Problem Display
PID: 219638 (1B6/1n6/3r4/4NQP1/2Pk4/P4P2/1P2PK2/8 w - - 0 1)

Herland, Robert

Deutsche Schachzeitung, 1909

1B6/1n6/3r4/4NQP1/2Pk4/P4P2/1P2PK2/8

#2

10 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.e3#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qe4#
        • 2.Qg4#
        • 2.Qf4#
      • 1...Re6
        • 2.Qd5#
      • 1...Rf6
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kxc4!
    • 1.Sc6+?
      • 1...Rxc6
        • 2.Qd5#
      • 1...Kxc4!
    • 1.Bxd6?
      • threat
        • 2.Qd3#
        • 2.Qe4#
        • 2.Qg4#
        • 2.Qf4#
        • 2.e3#
      • 1...Sc5
        • 2.e3#
      • 1...Sxd6!
    • 1.Ba7+?
      • 1...Sc5
        • 2.Qe4#
        • 2.Qf4#
        • 2.e3#
      • 1...Rb6!
    • 1.Qd3+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kc5!
    • 1.Qg4+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kc5!
  • Keys
    • 1.Qf8!
      • 1...Kc5
        • 2.Ba7#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Rd7
        • 2.e3#
      • 1...Rd5
        • 2.e3#
      • 1...Ra6
        • 2.e3#
      • 1...Rb6
        • 2.e3#
      • 1...Rc6
        • 2.e3#
      • 1...Re6
        • 2.e3#
      • 1...Rf6
        • 2.e3#
      • 1...Rg6
        • 2.e3#
      • 1...Rh6
        • 2.e3#
      • 1...Rd8
        • 2.e3#
      • 1...Sa5
        • 2.Qxd6#
      • 1...Sc5
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 14
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::P(B)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);N_GUARD::QAR1(H)
        • S(c);N_GUARD::QAB1(H),XS(c)
      • Refutation
        • K(a);P-FLIGHT,XP(F)
    • Try
      • S(G);CHECK
      • Vars
        • R(b);XS(G)::QAR1(H)
      • Refutation
        • K(a);P-FLIGHT,XP(F)
    • Try
      • B(J);XR(b)
      • Threat
        • DUALS(5)
      • Vars
        • S(c);::P(B)
      • Refutation
        • S(c);XB(J)
    • Try
      • B(J);CHECK
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);P_SPINR(b),S_FLIGHT,XS(G)::QAR1(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);P_SPINR(b),S_FLIGHT,XS(G)::QAR1(H)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(a);P_SPINR(b),S_FLIGHT::B(J)
      • K(a);OGATEB,P_SPINR(b),S_FLIGHT,XS(G)::QAB1(H)
      • R(b);::P(B)
      • R(b);P_PINP(E)::P(B)
      • S(c);N_GUARD::QAR2(H),XR(b)
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