MESON Chess Problem Database

Problem Display
PID: 261630 (r4nnK/8/1P4p1/4N3/1R5p/2k3qQ/1R4p1/4N3 w - - 0 1)

Baumann, Hannes

Wettstein, Markus

Schweizerische Schachzeitung, 1976

r4nnK/8/1P4p1/4N3/1R5p/2k3qQ/1R4p1/4N3

#2

7 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qf3
      • 2.Qxf3#
    • 1...Ra1
      • 2.Qc8#
    • 1...Ra2
      • 2.Qc8#
    • 1...Ra3
      • 2.Qc8#
    • 1...Ra4
      • 2.Qc8#
    • 1...Ra6
      • 2.Qc8#
    • 1...Rc8
      • 2.Qxc8#
  • Tries
    • 1.S1d3?
      • threat
        • 2.Rc4#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Qxd3
        • 2.Qxd3#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Ra4
        • 2.Qc8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Qg4!
    • 1.S5d3?
      • threat
        • 2.Rc2#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qxe1
        • 2.Sxe1#
      • 1...Qxd3
        • 2.Qxd3#
      • 1...Qf2
        • 2.Sxf2#
      • 1...Ra2!
    • 1.S5f3?
      • threat
        • 2.R2b3#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qxe1
        • 2.Sxe1#
      • 1...Qxf3
        • 2.Qxf3#
      • 1...Ra3!
    • 1.Qf5?
      • threat
        • 2.Qc2#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Qf2
        • 2.Qd3#
      • 1...Qd3
        • 2.Qxd3#
      • 1...gxf5!
    • 1.Qe6?
      • threat
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qc6#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...g1Q
        • 2.Qb3#
        • 2.Qc4#
      • 1...g1B
        • 2.Qb3#
        • 2.Qc4#
      • 1...Qf2
        • 2.Qb3#
        • 2.Qc4#
      • 1...Qf4
        • 2.Qb3#
      • 1...Qd3
        • 2.Qb3#
      • 1...Qe3
        • 2.Qb3#
        • 2.Qc4#
      • 1...Qf3
        • 2.Qb3#
        • 2.Qc4#
      • 1...Qg4
        • 2.Qb3#
      • 1...Ra3
        • 2.Qc4#
        • 2.Qc8#
        • 2.Qc6#
      • 1...Ra5
        • 2.Qb3#
        • 2.Qc4#
      • 1...Rc8
        • 2.Qb3#
        • 2.Qxc8#
      • 1...Sd7
        • 2.Qb3#
        • 2.Qc4#
      • 1...Se7
        • 2.Qb3#
        • 2.Qc4#
      • 1...Sxe6!
  • Keys
    • 1.S1f3!
      • threat
        • 2.R4b3#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Qxf3
        • 2.Qxf3#
      • 1...Ra3
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(c);OGATE::QAR1(C),XQ(c)
    • Q(c);OGATE::QAR2(C),XQ(c)
    • Q(c);OGATE::QAR(C),XQ(c)
    • R(f);N_GUARD::QAR(C)
    • R(f);N_GUARD::QAR(C),XR(f)
  • Tries
    • Try
      • S(A);N_PINQ(c)
      • Threat
        • R1(D)
      • Vars
        • Q(c);CHECK,XS(E)::QAR(C)+S(A),XQ(c)
        • Q(c);OGATE,P_SPINQ(c),XS(A)::QAR1(C),XQ(c)
        • Q(c);::QAR(C)+S(A),XQ(c)
        • R(f);N_GUARD::QAR(C)
        • R(f);N_GUARD::QAR(C),XR(f)
      • Refutation
        • Q(c);
    • Try
      • S(E);N_PINQ(c)
      • Threat
        • R1(B)
      • Vars
        • Q(c);CHECK::QAR(C)+S(E),XQ(c)
        • Q(c);XS(A)::QAR(C)+S(E),XQ(c)
        • Q(c);OGATE,P_SPINQ(c),XS(E)::QAR1(C),XQ(c)
        • Q(c);::QAR(C)+S(E),XQ(c)
      • Refutation
        • R(f);
    • Try
      • S(E);N_PINQ(c)
      • Threat
        • R1(B)
      • Vars
        • Q(c);CHECK::QAR(C)+S(E),XQ(c)
        • Q(c);XS(A)::QAR(C)+S(E),XQ(c)
        • Q(c);OGATE,P_SPINQ(c),XS(E)::QAR(C),XQ(c)
      • Refutation
        • R(f);
    • Try
      • Q(C);N_PINQ(c)
      • Threat
        • QAR1(C)
      • Vars
        • Q(c);CHECK,OGATE,XS(E)::QAB(C),XQ(c)
        • Q(c);N_GUARD::QAR1(C)
        • Q(c);N_GUARD::QAR1(C),XQ(c)
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);N_PINQ(c)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);CHECK,OGATE,XS(E)::QAB(C),XQ(c)
        • Q(c);::QAR1(C)
      • Refutation
        • S(g);XQ(C)
  • Actual
    • S(A);N_PINQ(c)
    • Threat
      • R1(D)
    • Vars
      • Q(c);CHECK,XS(E)::QAR(C)+S(A),XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XS(A)::QAR(C),XQ(c)
      • R(f);N_GUARD::QAR(C)
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