MESON Chess Problem Database

Problem Display
PID: 237266 (bB4B1/3Np3/1K2P1p1/2Pk1qRn/1Q2p3/1p6/3p4/n2r4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 2014

bB4B1/3Np3/1K2P1p1/2Pk1qRn/1Q2p3/1p6/3p4/n2r4

#2

8 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rxe5#
  • Tries
    • 1.Kb5?
      • threat
        • 2.Sb6#
        • 2.Qc4#
      • 1...Rc1
        • 2.Sb6#
        • 2.Qxd2#
      • 1...Bc6+!
    • 1.Sf6+?
      • 1...exf6
        • 2.e7#
      • 1...Sxf6!
    • 1.Be5?
      • threat
        • 2.Qd4#
      • 1...Qxe6+
        • 2.Bd6#
      • 1...Qxe5
        • 2.Rxe5#
      • 1...Qf2
        • 2.Bf4#
      • 1...Sc2
        • 2.Qxb3#
      • 1...Qf7!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qc4#
      • 1...Qxe6+
        • 2.Sc6#
      • 1...Qxe5
        • 2.Rxe5#
      • 1...Qf1
        • 2.Sf3#
      • 1...Rc1
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(g);OGATE::R1(C),XQ(g)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • B(k);CHECK
    • Try
      • S(F);CHECK
      • Vars
        • P(j);OGATE,XS(F)::B(H)+P(E)
      • Refutation
        • S(h);XS(F)
    • Try
      • B(G);N_PINQ(g)
      • Threat
        • QAR1(A)
      • Vars
        • Q(g);CHECK,OGATEB,P_SPINQ(g),XP(E)::R(C)+B(G)
        • Q(g);OGATE,P_SPINQ(g),XB(G)::R1(C),XQ(g)
        • Q(g);OGATEB,P_PINP(B)::R(C)+B(G)
        • S(a);N_GUARD::QAB(A),XP(d)
      • Refutation
        • Q(g);
  • Actual
    • S(F);N_PINQ(g)
    • Threat
      • QAB1(A)
    • Vars
      • Q(g);CHECK,P_SPINQ(g),XP(E)::R(C)+S(F)
      • Q(g);OGATE,P_SPINQ(g),XS(F)::R1(C),XQ(g)
      • Q(g);::R(C)+S(F)
      • R(b);N_GUARD::QAR(A),XP(c)
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