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Problem Display

PID: 15959 (8/7B/8/1N6/4p3/1b6/kB4Q1/2Kn4 w - - 0 1)

Morse, Christopher Jeremy

The Problemist, 1989

5 + 4

SOLUTION

SOUND
Sets
- 1...Bg8
  - 2.Bxg8#
  - 2.Qxg8#
- 1...Sxb2
  - 2.Qxb2#
- 1...Sf2
  - 2.Sc3#
- 1...Sc3
  - 2.Sxc3#
- 1...Se3
  - 2.Sc3#
- 1...e3
  - 2.Bb1#
Tries
- 1.Bc3+?
  - 1...Bc2
    - 2.Bg8#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sf2!
- 1.Bd4+?
  - 1...Bc2
    - 2.Bg8#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sf2!
- 1.Be5+?
  - 1...Bc2
    - 2.Bg8#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sf2!
- 1.Bf6+?
  - 1...Bc2
    - 2.Bg8#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sf2!
- 1.Bg7+?
  - 1...Bc2
    - 2.Bg8#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sf2!
- 1.Bh8+?
  - 1...Bc2
    - 2.Bg8#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sf2!
- 1.Qf3?
  - 1...exf3
    - 2.Bb1#
  - 1...Sf2
    - 2.Sc3#
  - 1...Bc2
    - 2.Qa3#
  - 1...Ba4
    - 2.Qa3#
  - 1...Bc4
    - 2.Qa3#
  - 1...Bd5
    - 2.Qa3#
  - 1...Be6
    - 2.Qa3#
  - 1...Bf7
    - 2.Qa3#
    - 2.Qxf7#
  - 1...Bg8
    - 2.Bxg8#
    - 2.Qa3#
  - 1...Sc3
    - 2.Sxc3#
  - 1...Se3
    - 2.Sc3#
  - 1...e3
    - 2.Bb1#
  - 1...Sxb2!
- 1.Qh3?
  - 1...Sf2
    - 2.Sc3#
  - 1...Bc2
    - 2.Qa3#
  - 1...Ba4
    - 2.Qa3#
  - 1...Bc4
    - 2.Qa3#
  - 1...Bd5
    - 2.Qa3#
  - 1...Be6
    - 2.Qxe6#
    - 2.Qa3#
  - 1...Bf7
    - 2.Qa3#
  - 1...Bg8
    - 2.Bxg8#
    - 2.Qa3#
  - 1...Sc3
    - 2.Sxc3#
  - 1...Se3
    - 2.Sc3#
  - 1...e3
    - 2.Bb1#
  - 1...Sxb2!
- 1.Qxe4?
  - threat
    - 2.Qb1#
  - 1...Ba4
    - 2.Qxa4#
  - 1...Bc4
    - 2.Qxc4#
  - 1...Bd5
    - 2.Qxd5#
    - 2.Qa4#
  - 1...Be6
    - 2.Qa4#
    - 2.Qxe6#
  - 1...Bf7
    - 2.Qa4#
  - 1...Bg8
    - 2.Bxg8#
    - 2.Qa4#
  - 1...Sc3
    - 2.Sxc3#
  - 1...Bc2!
- 1.Qc2?
  - threat
    - 2.Qb1#
  - 1...Ba4
    - 2.Qxa4#
  - 1...Bc4
    - 2.Qa4#
    - 2.Qxc4#
  - 1...Bd5
    - 2.Qa4#
  - 1...Be6
    - 2.Qa4#
  - 1...Bf7
    - 2.Qa4#
  - 1...Bg8
    - 2.Bxg8#
    - 2.Qa4#
  - 1...Sc3
    - 2.Sxc3#
  - 1...Bxc2!
- 1.Qg3?
  - 1...Sf2
    - 2.Sc3#
  - 1...Bc2
    - 2.Qa3#
  - 1...Ba4
    - 2.Qa3#
  - 1...Bc4
    - 2.Qa3#
  - 1...Bd5
    - 2.Qa3#
  - 1...Be6
    - 2.Qa3#
  - 1...Bf7
    - 2.Qa3#
  - 1...Bg8
    - 2.Bxg8#
    - 2.Qa3#
    - 2.Qxg8#
  - 1...Sc3
    - 2.Sxc3#
  - 1...Se3
    - 2.Sc3#
  - 1...e3
    - 2.Bb1#
  - 1...Sxb2!
- 1.Qg8?
  - 1...Bxg8
    - 2.Bxg8#
  - 1...Bc4
    - 2.Qxc4#
  - 1...Bd5
    - 2.Qxd5#
  - 1...Be6
    - 2.Qxe6#
  - 1...Bf7
    - 2.Qxf7#
  - 1...Sf2
    - 2.Sc3#
  - 1...Sc3
    - 2.Sxc3#
  - 1...Se3
    - 2.Sc3#
  - 1...e3
    - 2.Bb1#
  - 1...Sxb2!
Keys
- 1.Bg8!
  - 1...Bxg8
    - 2.Qxg8#
  - 1...Sxb2
    - 2.Qxb2#
  - 1...Bc4
    - 2.Bxc4#
  - 1...Bd5
    - 2.Bxd5#
  - 1...Be6
    - 2.Bxe6#
  - 1...Bf7
    - 2.Bxf7#
  - 1...Sf2
    - 2.Sc3#
  - 1...Sc3
    - 2.Sxc3#
    - 2.Bxc3#
  - 1...Se3
    - 2.Sc3#
  - 1...e3
    - 2.Qa8#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 1
Sets
- S(a);OGATE,P_SPINS(a),XB(B)::QAR1(C),XS(a)
- S(a);N_GUARD::S(D)
- S(a);N_GUARD::S(D),XS(a)
- P(d);OGATE::B(E)
Tries
- Try
  - B(B);CHECK
  - Vars
    - B(c);P_SPINB(c),S_CUTS(a),S_CUTS(a)::B(E)
    - S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
  - Refutation
    - S(a);P_SPINS(a)
- Try
  - B(B);CHECK
  - Vars
    - B(c);P_SPINB(c),S_CUTS(a),S_CUTS(a)::B(E)
    - S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
  - Refutation
    - S(a);P_SPINS(a)
- Try
  - B(B);CHECK
  - Vars
    - B(c);P_SPINB(c),S_CUTS(a),S_CUTS(a)::B(E)
    - S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
  - Refutation
    - S(a);P_SPINS(a)
- Try
  - B(B);CHECK
  - Vars
    - B(c);P_SPINB(c),S_CUTS(a),S_CUTS(a)::B(E)
    - S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
  - Refutation
    - S(a);P_SPINS(a)
- Try
  - B(B);CHECK
  - Vars
    - B(c);P_SPINB(c),S_CUTS(a),S_CUTS(a)::B(E)
    - S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
  - Refutation
    - S(a);P_SPINS(a)
- Try
  - B(B);CHECK
  - Vars
    - B(c);P_SPINB(c),S_CUTS(a),S_CUTS(a)::B(E)
    - S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
  - Refutation
    - S(a);P_SPINS(a)
- Try
  - Q(C);
  - Vars
    - P(d);OGATE,XQ(C)::B(E)
    - S(a);N_GUARD::S(D)
    - B(c);OGATE::QAR1(C)
    - S(a);N_GUARD::S(D),XS(a)
    - P(d);OGATE::B(E)
  - Refutation
    - S(a);XB(B)
- Try
  - Q(C);
  - Vars
    - S(a);N_GUARD::S(D)
    - B(c);OGATE::QAR1(C)
    - S(a);N_GUARD::S(D),XS(a)
    - P(d);OGATE::B(E)
  - Refutation
    - S(a);XB(B)
- Try
  - Q(C);XP(d)
  - Threat
    - QAB1(C)
  - Vars
    - B(c);N_GUARD::QAR2(C),XB(c)
    - B(c);OGATEB::QAB(C),XB(c)
    - B(c);N_GUARD::QAR2(C)
    - S(a);N_GUARD::S(D),XS(a)
  - Refutation
    - B(c);
- Try
  - Q(C);
  - Threat
    - QAB1(C)
  - Vars
    - B(c);OGATE::QAR2(C),XB(c)
    - B(c);OGATE::QAR2(C)
    - S(a);N_GUARD::S(D),XS(a)
  - Refutation
    - B(c);XQ(C)
- Try
  - Q(C);
  - Vars
    - S(a);N_GUARD::S(D)
    - B(c);OGATE::QAR1(C)
    - S(a);N_GUARD::S(D),XS(a)
    - P(d);OGATE::B(E)
  - Refutation
    - S(a);XB(B)
- Try
  - Q(C);P_PINB(c)
  - Vars
    - B(c);N_SPINB(c),OGATE,XQ(C)::B(E),XB(c)
    - B(c);OGATEB::QAB(C),XB(c)
    - S(a);N_GUARD::S(D)
    - S(a);N_GUARD::S(D),XS(a)
    - P(d);OGATE::B(E)
  - Refutation
    - S(a);XB(B)
Actual
- B(E);P_PINB(c)
- Vars
  - B(c);N_SPINB(c),OGATE,XB(E)::QAB(C),XB(c)
  - S(a);OGATE,P_SPINS(a),XB(B)::QAR1(C),XS(a)
  - B(c);OGATEB::B(E),XB(c)
  - S(a);N_GUARD::S(D)
  - P(d);OGATE::QAR(C)

MESON Chess Problem Database

Problem Display

PID: 15959 (8/7B/8/1N6/4p3/1b6/kB4Q1/2Kn4 w - - 0 1)

SOLUTION

FEATURES