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Problem Display

PID: 262309 (8/8/4R3/1n1n4/4R3/1K1k1N2/8/8 w - - 0 1)

Lipton, Michael

The Problemist, 2016

8/8/4R3/1n1n4/4R3/1K1k1N2/8/8

#2

4 + 3

15601	Albrecht-Leiss-Degener Collection	2022

SOLUTION

SOUND
Sets
- 1...Sa3
  - 2.Rd4#
- 1...Sbc3
  - 2.Rd4#
- 1...Sd4+
  - 2.Rxd4#
- 1...Sd6
  - 2.Rd4#
- 1...Sa7
  - 2.Rd4#
- 1...Sbc7
  - 2.Rd4#
- 1...Sdc3
  - 2.Re3#
- 1...Se3
  - 2.Rxe3#
- 1...Sb4
  - 2.Re3#
- 1...Sf4
  - 2.Re3#
- 1...Sb6
  - 2.Re3#
- 1...Sf6
  - 2.Re3#
- 1...Sdc7
  - 2.Re3#
- 1...Se7
  - 2.Re3#
Tries
- 1.Re7?
  - 1...Sd4+
    - 2.Rxd4#
  - 1...Se3
    - 2.Rxe3#
  - 1...Sdc3
    - 2.Re3#
  - 1...Sa3
    - 2.Rd4#
  - 1...Sbc3
    - 2.Rd4#
  - 1...Sd6
    - 2.Rd4#
  - 1...Sa7
    - 2.Rd4#
  - 1...Sbc7
    - 2.Rd4#
  - 1...Sb4
    - 2.Re3#
  - 1...Sf4
    - 2.Re3#
  - 1...Sb6
    - 2.Re3#
  - 1...Sf6
    - 2.Re3#
  - 1...Sdc7
    - 2.Re3#
  - 1...Sxe7!
- 1.Re8?
  - 1...Sd4+
    - 2.Rxd4#
  - 1...Se3
    - 2.Rxe3#
  - 1...Sdc3
    - 2.Re3#
  - 1...Sa3
    - 2.Rd4#
  - 1...Sbc3
    - 2.Rd4#
  - 1...Sd6
    - 2.Rd4#
  - 1...Sa7
    - 2.Rd4#
  - 1...Sbc7
    - 2.Rd4#
  - 1...Sb4
    - 2.Re3#
  - 1...Sf4
    - 2.Re3#
  - 1...Sb6
    - 2.Re3#
  - 1...Sf6
    - 2.Re3#
  - 1...Sdc7
    - 2.Re3#
  - 1...Se7!
Keys
- 1.R6e5!
  - 1...Sd4+
    - 2.Rxd4#
  - 1...Se3
    - 2.Rxe3#
  - 1...Sdc3
    - 2.Re3#
  - 1...Sa3
    - 2.Rd4#
  - 1...Sbc3
    - 2.Rd4#
  - 1...Sd6
    - 2.Rd4#
  - 1...Sa7
    - 2.Rd4#
  - 1...Sbc7
    - 2.Rd4#
  - 1...Sb4
    - 2.Re3#
  - 1...Sf4
    - 2.Re3#
  - 1...Sb6
    - 2.Re3#
  - 1...Sf6
    - 2.Re3#
  - 1...Sdc7
    - 2.Re3#
  - 1...Se7
    - 2.Re3#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- S(b);N_GUARD::R1(C)
- S(b);CHECK,N_GUARD::R1(C),XS(b)
- S(c);N_GUARD::R1(C)
- S(c);N_GUARD::R1(C),XS(c)
Tries
- Try
  - R(D);
  - Vars
    - S(b);CHECK,N_GUARD::R1(C),XS(b)
    - S(c);N_GUARD::R1(C),XS(c)
    - S(c);N_GUARD::R1(C)
    - S(b);N_GUARD::R1(C)
  - Refutation
    - S(c);XR(D)
- Try
  - R(D);
  - Vars
    - S(b);CHECK,N_GUARD::R1(C),XS(b)
    - S(c);N_GUARD::R1(C),XS(c)
    - S(c);N_GUARD::R1(C)
    - S(b);N_GUARD::R1(C)
  - Refutation
    - S(c);
Actual
- R(D);
- Vars
  - S(b);CHECK,N_GUARD::R1(C),XS(b)
  - S(c);N_GUARD::R1(C),XS(c)
  - S(c);N_GUARD::R1(C)
  - S(b);N_GUARD::R1(C)

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