MESON Chess Problem Database

Problem Display
PID: 183999 (8/2K5/8/2R5/2pkp3/8/B1Q5/8 w - - 0 1)

Alekseev, Yuri Mikhailovich

Kudesnik, 2018

8/2K5/8/2R5/2pkp3/8/B1Q5/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qxc4#
    • 1...c3
      • 2.Qxc3#
    • 1...e3
      • 2.Qxc4#
  • Tries
    • 1.Kb6?
      • threat
        • 2.Qd2#
      • 1...c3
        • 2.Qxc3#
      • 1...e3
        • 2.Qxc4#
      • 1...Ke3!
    • 1.Kc6?
      • threat
        • 2.Qd2#
      • 1...c3
        • 2.Qxc3#
      • 1...e3
        • 2.Rd5#
        • 2.Qxc4#
      • 1...Ke3!
    • 1.Kd6?
      • threat
        • 2.Qd2#
      • 1...c3
        • 2.Qxc3#
      • 1...e3
        • 2.Rxc4#
        • 2.Rd5#
        • 2.Qxc4#
      • 1...Ke3!
    • 1.Bb3?
      • 1...Kxc5
        • 2.Qxc4#
      • 1...cxb3
        • 2.Qc3#
      • 1...c3
        • 2.Qxc3#
      • 1...e3
        • 2.Qxc4#
      • 1...Ke3!
    • 1.Qb3?
      • 1...Kxc5
        • 2.Qxc4#
      • 1...c3
        • 2.Qxc3#
      • 1...e3
        • 2.Qxc4#
      • 1...cxb3!
    • 1.Qc1?
      • 1...Kxc5
        • 2.Qxc4#
      • 1...e3
        • 2.Qxc4#
      • 1...c3
        • 2.Rd5#
        • 2.Qxc3#
      • 1...Kd3!
    • 1.Qc3+?
      • 1...Kxc5
        • 2.Qxc4#
      • 1...Kxc3!
  • Keys
    • 1.Qe2!
      • 1...Kc3
        • 2.Rxc4#
      • 1...Kxc5
        • 2.Qxc4#
      • 1...e3
        • 2.Qxc4#
      • 1...c3
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINP(a),S_FLIGHT,XR(C)::QAR1(B),XP(a)
    • P(a);::QAB1(B),XP(a)
    • P(c);SBLOCK::QAR1(B),XP(a)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR2(B)
      • Vars
        • P(a);::QAB1(B),XP(a)
        • P(c);SBLOCK::QAR1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAR2(B)
      • Vars
        • P(a);::QAB1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR2(B)
      • Vars
        • P(a);::QAB1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XR(C)::QAR1(B),XP(a)
        • P(a);XB(A)::QAB1(B)
        • P(a);::QAB1(B),XP(a)
        • P(c);SBLOCK::QAR1(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT,XR(C)::QAR1(B),XP(a)
        • P(a);::QAB1(B),XP(a)
        • P(c);SBLOCK::QAR1(B),XP(a)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XR(C)::QAR1(B),XP(a)
        • P(c);SBLOCK::QAR1(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XR(C)::QAR1(B),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::R1(C),XP(a)
      • K(b);S_FLIGHT,XR(C)::QAR1(B),XP(a)
      • P(c);SBLOCK::QAR1(B),XP(a)
      • P(a);SBLOCK::R1(C)
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