MESON Chess Problem Database
Problem Display
PID: 64592 (7n/3pKp1r/3B1Nkp/5NrR/8/8/8/5RQ1 w - - 0 1)
Nelson, Nels H
Good Companions (February), 1916
#2
7 + 7
| 15 | British Chess Magazine | 1916 |
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Rxg1
- 2.Rxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...Rxg1
- Tries
- 1.Sxh6?
- threat
- 2.Qxg5#
- 1...Rxg1
- 2.Rxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Kg7!
- threat
- 1.Sd5?
- 1...Kxh5
- 2.Sf4#
- 1...Rxg1
- 2.Sf4#
- 1...Rg7
- 2.Rxh6#
- 1...Rg2
- 2.Sf4#
- 1...Rg3
- 2.Sf4#
- 1...Rg4
- 2.Sf4#
- 2.Qxg4#
- 1...f6+!
- 1...Kxh5
- 1.Rb1?
- 1...Rxg1
- 2.Rxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 1...Kxf5!
- 1...Rxg1
- 1.Rc1?
- 1...Rxg1
- 2.Rxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 1...Kxf5!
- 1...Rxg1
- 1.Rd1?
- 1...Rxg1
- 2.Rxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 1...Kxf5!
- 1...Rxg1
- 1.Re1?
- 1...Rxg1
- 2.Rxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 1...Kxf5!
- 1...Rxg1
- 1.Rf2?
- 1...Rg2
- 2.Rxg2#
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...Rxg1!
- 1...Rg2
- 1.Rf3?
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Rxg3#
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...Rxg1!
- 1...Rg2
- 1.Rf4?
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Rxg4#
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...Rxg1!
- 1...Rg2
- 1.Rh1?
- 1...Rxg1
- 2.Rhxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...h5!
- 1...Rxg1
- 1.Qg2?
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...Rxg2!
- 1...Rg3
- 1.Qg3?
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...Rxg3!
- 1...Rg4
- 1.Qg4?
- 1...Rg7
- 2.Sh4#
- 2.Rxh6#
- 1...Rxg4!
- 1...Rg7
- 1.Sxh6?
- Keys
- 1.Ra1!
- 1...Kxf5
- 2.Qb1#
- 1...Rxg1
- 2.Rxg1#
- 1...Rg2
- 2.Qxg2#
- 1...Rg3
- 2.Qxg3#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7
- 2.Sh4#
- 1...Kxf5
- 1.Ra1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- Tries
- Try
- S(C);XP(c)
- Threat
- QAR1(B),XR(a)
- Vars
- R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- Refutation
- K(b);P-FLIGHT
- Try
- S(F);
- Vars
- K(b);N_SPINR(a),S_FLIGHT,XR(D)::S(F)
- R(a);N_SPINR(a),XQ(B)::S(F)
- R(f);N_GUARD::R1(D),XP(c)
- R(a);::S(F)
- Refutation
- P(e);CHECK
- Try
- R(A);
- Vars
- R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- R(f);SBLOCK::S(C)
- Refutation
- K(b);S_FLIGHT,XS(C)
- Try
- R(A);
- Vars
- R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- R(f);SBLOCK::S(C)
- Refutation
- K(b);S_FLIGHT,XS(C)
- Try
- R(A);
- Vars
- R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- R(f);SBLOCK::S(C)
- Refutation
- K(b);S_FLIGHT,XS(C)
- Try
- R(A);
- Vars
- R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- R(f);SBLOCK::S(C)
- Refutation
- K(b);S_FLIGHT,XS(C)
- Try
- R(A);
- Vars
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- Refutation
- R(a);N_SPINR(a),XQ(B)
- Try
- R(A);
- Vars
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- Refutation
- R(a);N_SPINR(a),XQ(B)
- Try
- R(A);
- Vars
- R(a);OGATEB::QAR(B),XR(a)
- Refutation
- R(a);N_SPINR(a),XQ(B)
- Try
- R(D);
- Vars
- R(a);N_SPINR(a),OGATE,XQ(B)::R(D),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- Refutation
- P(c);
- Try
- Q(B);
- Vars
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- Refutation
- R(a);N_SPINR(a),XQ(B)
- Try
- Q(B);
- Vars
- R(a);OGATEB::QAR2(B),XR(a)
- Refutation
- R(a);N_SPINR(a),XQ(B)
- Try
- Q(B);
- Refutation
- R(a);N_SPINR(a),XQ(B)
- Try
- Actual
- R(A);
- Vars
- K(b);OGATEB,S_FLIGHT,XS(C)::QAB(B)
- R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
- R(a);OGATEB::QAR(B),XR(a)
- R(a);OGATEB::QAR2(B),XR(a)
- R(f);SBLOCK::S(C)
Developed and maintained by Brian Stephenson.
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