MESON Chess Problem Database
Problem Display
PID: 64587 (1K6/1Q6/1P6/rp6/kp1p4/1R1P4/1R1N4/r7 w - - 0 1)
Penrose, Lionel Sharples
2nd HM., Good Companions (March), 1916
#2
7 + 6
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Ra2#
- 1...Rc1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Rh1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3
- 2.Rxb4#
- 1...Ra6
- 2.Qxa6#
- 1...Ra7
- 2.Qxa7#
- 1...Ra8+
- 2.Qxa8#
- 1...Rb1
- Tries
- 1.Kc7?
- 1...Ra6
- 2.Qxa6#
- 1...Ra7
- 2.Qxa7#
- 1...Ra8
- 2.Qxa8#
- 1...Rb1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Rh1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3
- 2.Rxb4#
- 1...Rc1+!
- 1...Ra6
- 1.Kc8?
- 1...Ra8+
- 2.Qxa8#
- 1...Ra6
- 2.Qxa6#
- 1...Ra7
- 2.Qxa7#
- 1...Rb1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Rh1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3
- 2.Rxb4#
- 1...Rc1+!
- 1...Ra8+
- 1.Sb1?
- threat
- 2.Rxb4#
- 1...Ra8+
- 2.Qxa8#
- 1...Ra6
- 2.Qxa6#
- 1...Ra7
- 2.Qxa7#
- 1...Rxb1!
- threat
- 1.Sc4?
- threat
- 2.Rxb4#
- 1...Ra8+
- 2.Qxa8#
- 1...bxc4!
- threat
- 1.Se4?
- threat
- 2.Sc5#
- 1...Ra8+
- 2.Qxa8#
- 1...Ra6
- 2.Qxa6#
- 1...Ra7
- 2.Qxa7#
- 1...Rc1!
- threat
- 1.Rc2?
- 1...Ra8+
- 2.Qxa8#
- 1...Ra6
- 2.Qxa6#
- 1...Ra7
- 2.Qxa7#
- 1...Rb1
- 2.Ra2#
- 1...Rc1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Rh1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3!
- 1...Ra8+
- 1.Qa6?
- 1...Rb1
- 2.Ra2#
- 1...Rc1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Rh1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3
- 2.Rxb4#
- 1...Rxa6!
- 1...Rb1
- 1.Qa8?
- 1...Ra6
- 2.Qxa6#
- 1...Ra7
- 2.Qxa7#
- 1...Rb1
- 2.Ra2#
- 1...Rc1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Rh1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3
- 2.Rxb4#
- 1...Rxa8+!
- 1...Ra6
- 1.Qa7?
- 1...Ra6
- 2.Qxa6#
- 1...Rb1
- 2.Ra2#
- 1...Rc1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Rh1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3
- 2.Rxb4#
- 1...Rxa7!
- 1...Ra6
- 1.Kc7?
- Keys
- 1.Qh1!
- threat
- 2.Qxa1#
- 1...Ra8+
- 2.Qxa8#
- 1...Rxh1
- 2.Ra2#
- 1...Rb1
- 2.Ra2#
- 1...Rc1
- 2.Ra2#
- 1...Rd1
- 2.Ra2#
- 1...Re1
- 2.Ra2#
- 1...Rf1
- 2.Ra2#
- 1...Rg1
- 2.Ra2#
- 1...Ra2
- 2.Rxa2#
- 1...Ra3
- 2.Rxb4#
- threat
- 1.Qh1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- R(a);SBLOCK::R1(C),XP(c)
- R(e);OGATEB::QAR2(F),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(e);CHECK,OGATEB::QAR(F),XR(e)
- Tries
- Try
- K(G);S_FLIGHT
- Vars
- R(e);OGATEB::QAR2(F),XR(e)
- R(e);OGATEB,P_PINQ(F)::QAR(F),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- R(a);SBLOCK::R1(C),XP(c)
- Refutation
- R(a);CHECK
- Try
- K(G);P-FLIGHT
- Vars
- R(e);CHECK,OGATEB::QAR(F),XR(e)
- R(e);OGATEB::QAR2(F),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- R(a);SBLOCK::R1(C),XP(c)
- Refutation
- R(a);CHECK
- Try
- S(B);
- Threat
- R1(C),XP(c)
- Vars
- R(e);CHECK,OGATEB::QAR(F),XR(e)
- R(e);OGATEB::QAR2(F),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- Refutation
- R(a);XS(B)
- Try
- S(B);
- Threat
- R1(C),XP(c)
- Vars
- R(e);CHECK,OGATEB::QAR(F),XR(e)
- Refutation
- P(f);XS(B)
- Try
- S(B);
- Threat
- S(B)
- Vars
- R(e);CHECK,OGATEB::QAR(F),XR(e)
- R(e);OGATEB::QAR2(F),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- Refutation
- R(a);
- Try
- R(A);
- Vars
- R(e);CHECK,OGATEB::QAR(F),XR(e)
- R(e);OGATEB::QAR2(F),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- Refutation
- R(a);
- Try
- Q(F);P_PINR(e)
- Vars
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- R(a);SBLOCK::R1(C),XP(c)
- Refutation
- R(e);N_SPINR(e),XQ(F)
- Try
- Q(F);P_PINR(e)
- Vars
- R(e);OGATEB::QAR2(F),XR(e)
- R(e);OGATEB::QAR(F),XR(e)
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- R(a);SBLOCK::R1(C),XP(c)
- Refutation
- R(e);CHECK,N_SPINR(e),XQ(F)
- Try
- Q(F);P_PINR(e)
- Vars
- R(e);OGATEB::QAR2(F),XR(e)
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- R(a);SBLOCK::R1(C),XP(c)
- Refutation
- R(e);N_SPINR(e),XQ(F)
- Try
- Actual
- Q(F);
- Threat
- QAR(F),XR(a)
- Vars
- R(e);CHECK,OGATEB::QAR(F),XR(e)
- R(a);N_GUARD,XQ(F)::R(A)
- R(a);N_GUARD::R(A)
- R(a);N_GUARD::R(A),XR(a)
- R(a);SBLOCK::R1(C),XP(c)
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