MESON Chess Problem Database

Problem Display
PID: 249872 (k7/P7/K1Rr4/8/8/8/8/2Q5 w - - 0 1)

Maleika, Gerhard

Deutsche Schachzeitung, 1970

k7/P7/K1Rr4/8/8/8/8/2Q5

#2

4 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Rc8#
    • 1...Rd2
      • 2.Rc8#
    • 1...Rd3
      • 2.Rc8#
    • 1...Rd4
      • 2.Rc8#
    • 1...Rd5
      • 2.Rc8#
    • 1...Rxc6+
      • 2.Qxc6#
    • 1...Rd7
      • 2.Rc8#
  • Tries
    • 1.Rb6?
      • threat
        • 2.Qc8#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rd8
        • 2.Qc6#
      • 1...Rxb6+!
    • 1.Qb2?
      • threat
        • 2.Qb7#
        • 2.Qb8#
      • 1...Rd7
        • 2.Rc8#
        • 2.Qb8#
      • 1...Rd8
        • 2.Qb7#
      • 1...Rxc6+!
    • 1.Qd2?
      • 1...Rxd2
        • 2.Rc8#
      • 1...Rd3
        • 2.Rc8#
      • 1...Rd4
        • 2.Rc8#
      • 1...Rd5
        • 2.Rc8#
      • 1...Re6
        • 2.Qd8#
      • 1...Rf6
        • 2.Qd8#
      • 1...Rg6
        • 2.Qd8#
      • 1...Rh6
        • 2.Qd8#
      • 1...Rd7
        • 2.Rc8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Rxc6+!
    • 1.Qb1?
      • threat
        • 2.Qb7#
        • 2.Qb8#
      • 1...Rd7
        • 2.Rc8#
        • 2.Qb8#
      • 1...Rd8
        • 2.Qb7#
      • 1...Rxc6+!
    • 1.Qd1?
      • 1...Rxd1
        • 2.Rc8#
      • 1...Re6
        • 2.Qd8#
      • 1...Rd2
        • 2.Rc8#
      • 1...Rd3
        • 2.Rc8#
      • 1...Rd4
        • 2.Rc8#
      • 1...Rd5
        • 2.Rc8#
      • 1...Rf6
        • 2.Qd8#
      • 1...Rg6
        • 2.Qd8#
      • 1...Rh6
        • 2.Qd8#
      • 1...Rd7
        • 2.Rc8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Rxc6+!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Rxd6#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Re6
        • 2.Rxe6#
      • 1...Rd1
        • 2.Rc8#
      • 1...Rd2
        • 2.Rc8#
      • 1...Rd3
        • 2.Rc8#
      • 1...Rd4
        • 2.Rc8#
      • 1...Rd5
        • 2.Rc8#
      • 1...Rf6
        • 2.Rxf6#
      • 1...Rg6
        • 2.Rxg6#
      • 1...Rh6
        • 2.Rxh6#
      • 1...Rd7
        • 2.Rc8#
      • 1...Rd8
        • 2.Rd6#
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(a);N_PINR(C)::R(C)
    • R(a);CHECK,OGATE,XR(C)::QAB(A),XR(a)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAR2(A)
      • Vars
        • R(a);N_GUARD::QAB(A),XR(a)
        • R(a);N_GUARD,N_PINR(C)::QAB(A)
      • Refutation
        • R(a);CHECK,XR(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_PINR(C)::QAB1(A)
      • Refutation
        • R(a);CHECK,XR(C)
    • Try
      • Q(A);
      • Vars
        • R(a);N_PINR(C),XQ(A)::R(C)
        • R(a);N_PINR(C)::R(C)
        • R(a);OGATE::QAR(A)
        • R(a);N_PINR(C),OGATE::QAR(A),XR(a)
      • Refutation
        • R(a);CHECK,XR(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_PINR(C)::QAB1(A)
      • Refutation
        • R(a);CHECK,XR(C)
    • Try
      • Q(A);
      • Vars
        • R(a);N_PINR(C),XQ(A)::R(C)
        • R(a);OGATE::QAR(A)
        • R(a);N_PINR(C)::R(C)
        • R(a);N_PINR(C),OGATE::QAR(A),XR(a)
      • Refutation
        • R(a);CHECK,XR(C)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(C),XR(a)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XR(C)::QAB(A),XR(a)
      • R(a);::QAB(A)+R(C),XR(a)
      • R(a);N_PINR(C)::QAB(A)+R(C),DCHECK
      • R(a);N_PINR(C)::R(C)
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