MESON Chess Problem Database
Problem Display
PID: 217745 (4B3/3N4/8/1r6/2k5/Q7/3RK3/8 w - - 0 1)
Macleod, Norman Alasdair
Deutsche Schachzeitung, 1984
#2
5 + 2
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Se5#
- 1...Rb2
- 2.Se5#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Qd3#
- 1...Ra5
- 2.Sb6#
- 1...Rc5
- 2.Sb6#
- 1...Rd5
- 2.Sb6#
- 1...Re5+
- 2.Sxe5#
- 1...Rf5
- 2.Sb6#
- 1...Rg5
- 2.Sb6#
- 1...Rh5
- 2.Sb6#
- 1...Rb6
- 2.Se5#
- 2.Sxb6#
- 1...Rb7
- 2.Se5#
- 1...Rb8
- 2.Se5#
- 1...Rb1
- Tries
- 1.Kd1?
- 1...Rb2
- 2.Se5#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Qd3#
- 1...Ra5
- 2.Sb6#
- 1...Rc5
- 2.Sb6#
- 1...Rd5
- 2.Sb6#
- 1...Re5
- 2.Sxe5#
- 2.Sb6#
- 1...Rf5
- 2.Sb6#
- 1...Rg5
- 2.Sb6#
- 1...Rh5
- 2.Sb6#
- 1...Rb6
- 2.Se5#
- 2.Sxb6#
- 1...Rb7
- 2.Se5#
- 1...Rb8
- 2.Se5#
- 1...Rb1+!
- 1...Rb2
- 1.Ke1?
- 1...Re5+
- 2.Sxe5#
- 1...Rb2
- 2.Se5#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Qd3#
- 1...Ra5
- 2.Sb6#
- 1...Rc5
- 2.Sb6#
- 1...Rd5
- 2.Sb6#
- 1...Rf5
- 2.Sb6#
- 1...Rg5
- 2.Sb6#
- 1...Rh5
- 2.Sb6#
- 1...Rb6
- 2.Se5#
- 2.Sxb6#
- 1...Rb7
- 2.Se5#
- 1...Rb8
- 2.Se5#
- 1...Rb1+!
- 1...Re5+
- 1.Kf2?
- 1...Rb1
- 2.Se5#
- 1...Rb2
- 2.Se5#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Qd3#
- 1...Ra5
- 2.Sb6#
- 1...Rc5
- 2.Sb6#
- 1...Rd5
- 2.Sb6#
- 1...Re5
- 2.Sxe5#
- 2.Sb6#
- 1...Rg5
- 2.Sb6#
- 1...Rh5
- 2.Sb6#
- 1...Rb6
- 2.Se5#
- 2.Sxb6#
- 1...Rb7
- 2.Se5#
- 1...Rb8
- 2.Se5#
- 1...Rf5+!
- 1...Rb1
- 1.Ke3?
- threat
- 2.Rd4#
- 1...Re5+
- 2.Sxe5#
- 1...Rb1
- 2.Se5#
- 1...Rb2
- 2.Se5#
- 1...Rb4
- 2.Qd3#
- 1...Ra5
- 2.Sb6#
- 1...Rc5
- 2.Sb6#
- 1...Rd5
- 2.Sb6#
- 1...Rf5
- 2.Sb6#
- 1...Rg5
- 2.Sb6#
- 1...Rh5
- 2.Sb6#
- 1...Rb6
- 2.Se5#
- 2.Sxb6#
- 1...Rb7
- 2.Se5#
- 1...Rb8
- 2.Se5#
- 1...Rb3+!
- threat
- 1.Rd1?
- 1...Re5+
- 2.Sxe5#
- 1...Rb1
- 2.Se5#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Qd3#
- 1...Ra5
- 2.Sb6#
- 1...Rc5
- 2.Sb6#
- 1...Rd5
- 2.Sb6#
- 1...Rf5
- 2.Sb6#
- 1...Rg5
- 2.Sb6#
- 1...Rh5
- 2.Sb6#
- 1...Rb6
- 2.Se5#
- 2.Sxb6#
- 1...Rb7
- 2.Se5#
- 1...Rb8
- 2.Se5#
- 1...Rb2+!
- 1...Re5+
- 1.Rc2+?
- 1...Kd4
- 2.Qd3#
- 1...Kd5!
- 1...Kd4
- 1.Qa4+?
- 1...Kc3
- 2.Rc2#
- 1...Rb4!
- 1...Kc3
- 1.Kd1?
- Keys
- 1.Rd4+!
- 1...Kxd4
- 2.Qd3#
- 1...Kxd4
- 1.Rd4+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 13
- Sets
- R(b);N_GUARD::S(D)
- R(b);N_GUARD,P_PINR(A)::S(D)
- R(b);N_GUARD,SBLOCK::QAR1(C)
- R(b);SBLOCK::QAB1(C)
- R(b);CHECK,N_GUARD::S(D),XR(b)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- R(b);N_GUARD::S(D)
- R(b);N_GUARD,SBLOCK::QAR1(C)
- R(b);SBLOCK::QAB1(C)
- R(b);N_GUARD,P_PINR(A)::S(D)
- Refutation
- R(b);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- R(b);CHECK,N_GUARD::S(D),XR(b)
- R(b);N_GUARD::S(D)
- R(b);N_GUARD,SBLOCK::QAR1(C)
- R(b);SBLOCK::QAB1(C)
- Refutation
- R(b);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- R(b);N_GUARD::S(D)
- R(b);N_GUARD,P_PINR(A)::S(D)
- R(b);N_GUARD,SBLOCK::QAR1(C)
- R(b);SBLOCK::QAB1(C)
- Refutation
- R(b);CHECK
- Try
- K(B);P-FLIGHT
- Threat
- R1(A)
- Vars
- R(b);CHECK,N_GUARD::S(D),XR(b)
- R(b);N_GUARD::S(D)
- R(b);SBLOCK::QAB1(C)
- Refutation
- R(b);CHECK
- Try
- R(A);
- Vars
- R(b);CHECK,N_GUARD::S(D),XR(b)
- R(b);N_GUARD::S(D)
- R(b);N_GUARD,SBLOCK::QAR1(C)
- R(b);SBLOCK::QAB1(C)
- Refutation
- R(b);CHECK
- Try
- R(A);CHECK
- Vars
- K(a);P-FLIGHT::QAR1(C)
- Refutation
- K(a);S_FLIGHT
- Try
- Q(C);CHECK
- Vars
- K(a);P-FLIGHT::R1(A)
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- R(A);CHECK
- Vars
- K(a);P-FLIGHT,XR(A)::QAR1(C)
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