MESON Chess Problem Database

Problem Display
PID: 196917 (1Q2n3/4p3/2R1P3/n2N4/2PkN3/p2P3R/1q2P1K1/Bbb5 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

Tijdschrift vd NSB, 1919

1Q2n3/4p3/2R1P3/n2N4/2PkN3/p2P3R/1q2P1K1/Bbb5

#2

11 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Bxc3#
    • 1...Sd6
      • 2.Qh8#
    • 1...Sc7
      • 2.Qh8#
  • Tries
    • 1.Sec3?
      • threat
        • 2.Sb5#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qxc3
        • 2.Bxc3#
      • 1...Bxd3
        • 2.Rxd3#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sd6
        • 2.Qh8#
      • 1...Sc7
        • 2.Qh8#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Sxc6!
    • 1.Sxe7?
      • threat
        • 2.Sf5#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qh8#
      • 1...Sc7
        • 2.Qh8#
      • 1...Sg7
        • 2.Qd6#
      • 1...Bxd3!
    • 1.Rh5?
      • threat
        • 2.Qe5#
        • 2.Qa7#
        • 2.Qb6#
      • 1...Bxd3
        • 2.Qe5#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sxc6
        • 2.Qb6#
      • 1...Bf4
        • 2.Qa7#
        • 2.Qb6#
      • 1...Sb3
        • 2.Qe5#
      • 1...Sb7
        • 2.Qe5#
      • 1...Sd6
        • 2.Qa7#
        • 2.Qb6#
        • 2.Qh8#
      • 1...Sc7
        • 2.Qa7#
        • 2.Qb6#
        • 2.Qh8#
      • 1...Bg5!
  • Keys
    • 1.Sdc3!
      • threat
        • 2.Sb5#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qxc3
        • 2.Bxc3#
      • 1...Bxd3
        • 2.Rxd3#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sd6
        • 2.Qh8#
      • 1...Sc7
        • 2.Qh8#
      • 1...Qb5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_PINP(B),OGATE::B(A),XQ(c)
    • S(h);OGATE::QAB(K)
  • Tries
    • Try
      • S(G);N_PINQ(c)
      • Threat
        • S(G)
      • Vars
        • Q(c);CHECK,XP(B)::B(A)+S(G),DCHECK,XQ(c)
        • Q(c);N_PINP(B),OGATE,P_SPINQ(c),XS(G)::B(A),XQ(c)
        • B(a);OGATE,XP(D)::R1(E),XB(a)
        • S(f);OGATE,XP(F)::R1(I),XS(f)
        • S(h);OGATE::QAB(K)
        • Q(c);N_PINP(B)::B(A)+S(G),DCHECK,XQ(c)
      • Refutation
        • S(f);XR(I)
    • Try
      • S(H);XP(g)
      • Threat
        • S(H)
      • Vars
        • S(f);OGATE,XP(F)::R1(I),XS(f)
        • S(h);OGATE::QAB(K)
        • S(h);N_GUARD::QAR2(K)
      • Refutation
        • B(a);XP(D)
    • Try
      • R(E);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);XP(D)::QAB1(K)
        • S(f);OGATE,XP(F)::R1(I),XS(f)
        • S(f);XR(I)::QAB(K)
        • S(f);::QAB1(K)
      • Refutation
        • B(b);
  • Actual
    • S(H);N_PINQ(c)
    • Threat
      • S(H)
    • Vars
      • Q(c);CHECK,XP(B)::B(A)+S(H),DCHECK,XQ(c)
      • Q(c);N_PINP(B),OGATE,P_SPINQ(c),XS(H)::B(A),XQ(c)
      • B(a);OGATE,XP(D)::R1(E),XB(a)
      • S(f);OGATE,XP(F)::R1(I),XS(f)
      • S(h);OGATE::QAB(K)
      • Q(c);N_PINP(B)::B(A)+S(H),DCHECK,XQ(c)
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